Recognised as Number
676,821
- Positive
- Odd
- Composite
- 6 digits
676,821 is an odd 6-digit integer and a composite number. It has 16 divisors and a digital root of 3.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value676,821
Digit count6
Digit sum30
Digit product4,032
Multiplicative persistence2times the digit product can be taken before one digit is left
Digital root3repeated digit sum
PalindromicNoreads differently backwards
Happy numberYessquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation3 × 17 × 23 × 577
Distinct prime factors43, 17, 23, 577
Number of divisors16
Sum of divisors σ(n)998,784
Aliquot sum321,963sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)405,504integers below n that share no factor with it
Carmichael function λ(n)6,336the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 405,504
Möbius function μ(n)+14 distinct prime factors, an even number of them
SquarefreeYesno repeated prime factor
All divisors1, 3, 17, 23, 51, 69, 391, 577, 1,173, 1,731, 9,809, 13,271, 29,427, 39,813, 225,607, 676,82116 in total
Arithmetic
Representations
Decimal676,821
Binary1010010100111101010120 bits
Octal2451725
HexadecimalA53D5
Base 36EI8L
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordssix hundred and seventy-six thousand, eight hundred and twenty-one
Ordinalsix hundred and seventy-six thousand, eight hundred and twenty-first
Scientific notation6.76821 × 10^5
Engineering notation676.821 × 10^3
In other bases
Ternary1021101102110base 3; the most digit-efficient integer base after e: 13 digits
Quinary133124241base 5; one hand: 9 digits
Septenary5516145base 7: 7 digits
Nonary1241373base 9; each digit is two ternary digits: 7 digits
Duodecimal287819base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 6 digits
Vigesimal44c11base 20; hands and feet, and the Mayan and Yoruba systems: 5 digits
Sexagesimal3:8:0:21base 60; Babylonian, and still how an hour and a circle are divided: 4 digits
Balanced ternary11T110111T110digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary111100101010011010101base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
00000000000010100101001111010101
Bit length20 bitsto write the magnitude
Set bits11the population count, or Hamming weight
Zero bits9within that length
Bit parityodd11 set bits, so odd; not the same as the number itself being odd
Highest set bitbit 19worth 524,288
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes30a 53 d5
Gray code11110111101000111111n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
32-bit00000000000010100101001111010101
64-bit0000000000000000000000000000000000000000000010100101001111010101
One's complement11111111111101011010110000101010at 32 bits, every bit flipped
Bits reversed10101011110010100101000000000000at 32 bits
Rotated left by 100000000000101001010011110101010at 32 bits, wrapping
Shifted left by 1101001010011110101010= 1,353,642, no wrap
Shifted right by 11010010100111101010= 338,410, discarding the low bit
These bits as a double3.34394004 × 10^-318≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
676,821 to the power 2458,086,666,041
676,821 to the power 3310,042,675,396,535,661
676,821 to the power 4209,843,393,604,558,662,613,681
676,821 to the power 5142,026,415,502,830,998,588,854,188,101
First ten multiples676,821, 1,353,642, 2,030,463, 2,707,284, 3,384,105, 4,060,926, 4,737,747, 5,414,568, 6,091,389, 6,768,210
Powers of twoBetween 2^19 (524,288) and 2^20 (1,048,576)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3Yes
Divisible by 4No, remainder 1
Divisible by 5No, remainder 1
Divisible by 6No, remainder 3
Divisible by 7No, remainder 5
Divisible by 8No, remainder 5
Divisible by 9No, remainder 3
Divisible by 10No, remainder 1
Divisible by 11No, remainder 2
Divisible by 12No, remainder 9
Divisible by 100No, remainder 21
Collatz (3n + 1) trajectory
Steps to reach 184the total stopping time
Highest value reached2,030,4643× the starting value
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps676,821 → 2,030,464 → 1,015,232 → 507,616 → 253,808 → 126,904 → 63,452 → 31,726 → 15,863 → 47,590 → …
Last steps… → 32 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage67,682,100%
676,821% as a decimal6,768.21
676,821% of 100676,821
676,821% of 1,0006,768,210
As a fraction of 100676,821/100
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Derived from 676,821
Also reads as
#676821 (colour)
- #676821
- Yellow
- Dark
- Nearest: Dark olivegreen
#676821 is a yellow with RGB values 103, 104, 33 and HSL 61°, 52%, 27%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Dark olivegreen.
Colour values
#676821#676821
HEX#676821
RGBrgb(103, 104, 33)
RGB (0–1)0.4039, 0.4078, 0.1294
RGB percentages40.4%, 40.8%, 12.9%
HSLhsl(60.8, 51.8%, 26.9%)
HSV / HSBhsv(60.8, 68.3%, 40.8%)
CMYK1%, 0%, 68.3%, 59.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,776,865
CSS custom property--colour: #676821;
Brightness & contrast
Relative luminance0.12894WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.87:1
Contrast with white5.87:1WCAG normal text: AA
Contrast with black3.58:1WCAG normal text: Fail
Greyscale equivalent#636363
Inverted#9897DE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.87:1WCAG large text: AAA
Contrast with black, large text3.58:1WCAG large text: AA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#222168
Analogous#684621, #446821
Triadic#216768, #682167
Split complementary#214468, #452168
Tetradic#216845, #222168, #682144
Tints, shades & saturation
Channel breakdown
R103
G104
B33
Red103 (40.4%)
Green104 (40.8%)
Blue33 (12.9%)
Hue60.85°
Saturation (HSL)51.82%
Lightness26.86%
Dominant channelGreen
Hex per channelR 67 · G 68 · B 21
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Harmonies
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