Recognised as Number
277
- Positive
- Odd
- Prime
- 3 digits
277 is an odd 3-digit integer and a prime number. It has 2 divisors and a digital root of 7.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value277
Digit count3
Digit sum16
Digit product98
Multiplicative persistence4times the digit product can be taken before one digit is left
Digital root7repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation277
Distinct prime factors1277
Number of divisors2
Sum of divisors σ(n)278
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)276integers below n that share no factor with it
Carmichael function λ(n)276the smallest exponent with aˣ ≡ 1 for every unit coprime to n
Möbius function μ(n)−11 distinct prime factor, an odd number of them
SquarefreeYesno repeated prime factor
All divisors1, 2772 in total
Arithmetic
Representations
Decimal277
Binary1000101019 bits
Octal425
Hexadecimal115
Base 367P
Roman numeralCCLXXVII
In wordstwo hundred and seventy-seven
Ordinaltwo hundred and seventy-seventh
Scientific notation2.77 × 10^2
Engineering notation277
In other bases
Ternary101021base 3; the most digit-efficient integer base after e: 6 digits
Quinary2102base 5; one hand: 4 digits
Septenary544base 7: 3 digits
Nonary337base 9; each digit is two ternary digits: 3 digits
Duodecimal1b1base 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimaldhbase 20; hands and feet, and the Mayan and Yoruba systems: 2 digits
Sexagesimal4:37base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary1011T1digits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary100010101base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000000100010101
Bit length9 bitsto write the magnitude
Set bits4the population count, or Hamming weight
Zero bits5within that length
Bit parityeven4 set bits, so even; not the same as the number itself being odd
Highest set bitbit 8worth 256
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes201 15
Gray code110011111n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000000100010101
32-bit00000000000000000000000100010101
64-bit0000000000000000000000000000000000000000000000000000000100010101
One's complement1111111011101010at 16 bits, every bit flipped
Bits reversed1010100010000000at 16 bits
Rotated left by 10000001000101010at 16 bits, wrapping
Shifted left by 11000101010= 554, no wrap
Shifted right by 110001010= 138, discarding the low bit
These bits as a double1.36856184 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
277 to the power 276,729
277 to the power 321,253,933
277 to the power 45,887,339,441
277 to the power 51,630,793,025,157
First ten multiples277, 554, 831, 1,108, 1,385, 1,662, 1,939, 2,216, 2,493, 2,770
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 1
Divisible by 5No, remainder 2
Divisible by 6No, remainder 1
Divisible by 7No, remainder 4
Divisible by 8No, remainder 5
Divisible by 9No, remainder 7
Divisible by 10No, remainder 7
Divisible by 11No, remainder 2
Divisible by 12No, remainder 1
Divisible by 100No, remainder 77
Collatz (3n + 1) trajectory
Steps to reach 116the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps277 → 832 → 416 → 208 → 104 → 52 → 26 → 13 → 40 → 20 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage27,700%
277% as a decimal2.77
277% of 100277
277% of 1,0002,770
As a fraction of 100277/100
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Derived from 277
Other readings
Also reads as
#227777 (colour)
- #227777
- Cyan
- Dark
- Nearest: Teal
#227777 is a cyan with RGB values 34, 119, 119 and HSL 180°, 56%, 30%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Teal.
Colour values
#227777#227777
HEX#227777
HEX (short)#277
RGBrgb(34, 119, 119)
RGB (0–1)0.1333, 0.4667, 0.4667
RGB percentages13.3%, 46.7%, 46.7%
HSLhsl(180, 55.6%, 30%)
HSV / HSBhsv(180, 71.4%, 46.7%)
CMYK71.4%, 0%, 0%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,258,807
CSS custom property--colour: #227777;
Brightness & contrast
Relative luminance0.14866WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.29:1
Contrast with white5.29:1WCAG normal text: AA
Contrast with black3.97:1WCAG normal text: Fail
Greyscale equivalent#656565
Inverted#DD8888
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.29:1WCAG large text: AAA
Contrast with black, large text3.97:1WCAG large text: AA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#772222
Analogous#22774D, #224D77
Triadic#772277, #777722
Split complementary#77224D, #774D22
Tetradic#4D2277, #772222, #4D7722
Tints, shades & saturation
Channel breakdown
R34
G119
B119
Red34 (13.3%)
Green119 (46.7%)
Blue119 (46.7%)
Hue180°
Saturation (HSL)55.56%
Lightness30%
Dominant channelGreen and Blue
Hex per channelR 22 · G 77 · B 77
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