Number
979
- Positive
- Odd
- Composite
- 3 digits
979 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 7.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value979
Digit count3
Digit sum25
Digital root7repeated digit sum
PalindromicYesreads the same backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation11 × 89
Distinct prime factors211, 89
Number of divisors4
Sum of divisors σ(n)1,080
Aliquot sum101sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)880integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 11, 89, 9794 in total
Arithmetic
Representations
Decimal979
Binary111101001110 bits
Octal1723
Hexadecimal3D3
Base 36R7
Roman numeralCMLXXIX
In wordsnine hundred and seventy-nine
Ordinalnine hundred and seventy-ninth
Scientific notation9.79 × 10^2
Engineering notation979
Nearest landmarks
Powers & multiples
979 to the power 2958,441
979 to the power 3938,313,739
979 to the power 4918,609,150,481
979 to the power 5899,318,358,320,899
First ten multiples979, 1,958, 2,937, 3,916, 4,895, 5,874, 6,853, 7,832, 8,811, 9,790
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 1
Divisible by 4No, remainder 3
Divisible by 5No, remainder 4
Divisible by 6No, remainder 1
Divisible by 7No, remainder 6
Divisible by 8No, remainder 3
Divisible by 9No, remainder 7
Divisible by 10No, remainder 9
Divisible by 11Yes
Divisible by 12No, remainder 7
Divisible by 100No, remainder 79
Collatz (3n + 1) trajectory
Steps to reach 149the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps979 → 2,938 → 1,469 → 4,408 → 2,204 → 1,102 → 551 → 1,654 → 827 → 2,482 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage97,900%
979% as a decimal9.79
979% of 100979
979% of 1,0009,790
As a fraction of 100979/100
Read another way
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Derived from 979
Other readings
Also reads as
#997799 (colour)
- #997799
- Magenta
- Dark
- Nearest: Slate grey
#997799 is a magenta with RGB values 153, 119, 153 and HSL 300°, 14%, 53%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Slate grey.
Colour values
#997799#997799
HEX#997799
HEX (short)#979
RGBrgb(153, 119, 153)
RGB (0–1)0.6, 0.4667, 0.6
RGB percentages60%, 46.7%, 60%
HSLhsl(300, 14.3%, 53.3%)
HSV / HSBhsv(300, 22.2%, 60%)
CMYK0%, 22.2%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,057,625
CSS custom property--colour: #997799;
Brightness & contrast
Relative luminance0.22266WCAG 2.x, 0 is black and 1 is white
Perceived brightness134.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.45:1
Contrast with white3.85:1WCAG normal text: Fail
Contrast with black5.45:1WCAG normal text: AA
Greyscale equivalent#818181
Inverted#668866
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.85:1WCAG large text: AA
Contrast with black, large text5.45:1WCAG large text: AAA
Named colours
Hue familymagenta
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#779977
Analogous#887799, #997788
Triadic#999977, #779999
Split complementary#889977, #779988
Tetradic#998877, #779977, #778899
Tints, shades & saturation
Channel breakdown
R153
G119
B153
Red153 (60%)
Green119 (46.7%)
Blue153 (60%)
Hue300°
Saturation (HSL)14.29%
Lightness53.33%
Dominant channelRed and Blue
Hex per channelR 99 · G 77 · B 99
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Harmonies
Similar named colours
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