Recognised as Number
779
- Positive
- Odd
- Composite
- 3 digits
779 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 5.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value779
Digit count3
Digit sum23
Digit product441
Multiplicative persistence3times the digit product can be taken before one digit is left
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation19 × 41
Distinct prime factors219, 41
Number of divisors4
Sum of divisors σ(n)840
Aliquot sum61sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)720integers below n that share no factor with it
Carmichael function λ(n)360the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 720
Möbius function μ(n)+12 distinct prime factors, an even number of them
SquarefreeYesno repeated prime factor
All divisors1, 19, 41, 7794 in total
Arithmetic
Representations
Decimal779
Binary110000101110 bits
Octal1413
Hexadecimal30B
Base 36LN
Roman numeralDCCLXXIX
In wordsseven hundred and seventy-nine
Ordinalseven hundred and seventy-ninth
Scientific notation7.79 × 10^2
Engineering notation779
In other bases
Ternary1001212base 3; the most digit-efficient integer base after e: 7 digits
Quinary11104base 5; one hand: 5 digits
Septenary2162base 7: 4 digits
Nonary1055base 9; each digit is two ternary digits: 4 digits
Duodecimal54bbase 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimal1ijbase 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal12:59base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary101T0TTdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary11100011111base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000001100001011
Bit length10 bitsto write the magnitude
Set bits5the population count, or Hamming weight
Zero bits5within that length
Bit parityodd5 set bits, so odd; not the same as the number itself being odd
Highest set bitbit 9worth 512
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes203 0b
Gray code1010001110n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000001100001011
32-bit00000000000000000000001100001011
64-bit0000000000000000000000000000000000000000000000000000001100001011
One's complement1111110011110100at 16 bits, every bit flipped
Bits reversed1101000011000000at 16 bits
Rotated left by 10000011000010110at 16 bits, wrapping
Shifted left by 111000010110= 1,558, no wrap
Shifted right by 1110000101= 389, discarding the low bit
These bits as a double3.84877138 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
779 to the power 2606,841
779 to the power 3472,729,139
779 to the power 4368,255,999,281
779 to the power 5286,871,423,439,899
First ten multiples779, 1,558, 2,337, 3,116, 3,895, 4,674, 5,453, 6,232, 7,011, 7,790
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 3
Divisible by 5No, remainder 4
Divisible by 6No, remainder 5
Divisible by 7No, remainder 2
Divisible by 8No, remainder 3
Divisible by 9No, remainder 5
Divisible by 10No, remainder 9
Divisible by 11No, remainder 9
Divisible by 12No, remainder 11
Divisible by 100No, remainder 79
Collatz (3n + 1) trajectory
Steps to reach 159the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps779 → 2,338 → 1,169 → 3,508 → 1,754 → 877 → 2,632 → 1,316 → 658 → 329 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage77,900%
779% as a decimal7.79
779% of 100779
779% of 1,0007,790
As a fraction of 100779/100
Read another way
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Derived from 779
Other readings
Also reads as
#777799 (colour)
- #777799
- Blue
- Dark
- Nearest: Slate grey
#777799 is a blue with RGB values 119, 119, 153 and HSL 240°, 14%, 53%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Slate grey.
Colour values
#777799#777799
HEX#777799
HEX (short)#779
RGBrgb(119, 119, 153)
RGB (0–1)0.4667, 0.4667, 0.6
RGB percentages46.7%, 46.7%, 60%
HSLhsl(240, 14.3%, 53.3%)
HSV / HSBhsv(240, 22.2%, 60%)
CMYK22.2%, 22.2%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer7,829,401
CSS custom property--colour: #777799;
Brightness & contrast
Relative luminance0.19415WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.88:1
Contrast with white4.3:1WCAG normal text: Fail
Contrast with black4.88:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#888866
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.3:1WCAG large text: AA
Contrast with black, large text4.88:1WCAG large text: AAA
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#999977
Analogous#778899, #887799
Triadic#997777, #779977
Split complementary#998877, #889977
Tetradic#997788, #999977, #779988
Tints, shades & saturation
Channel breakdown
R119
G119
B153
Red119 (46.7%)
Green119 (46.7%)
Blue153 (60%)
Hue240°
Saturation (HSL)14.29%
Lightness53.33%
Dominant channelBlue
Hex per channelR 77 · G 77 · B 99
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Harmonies
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