Number
297
- Positive
- Odd
- Composite
- 3 digits
297 is an odd 3-digit integer and a composite number. It has 8 divisors and a digital root of 9.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value297
Digit count3
Digit sum18
Digital root9repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation3^3 × 11
Distinct prime factors23, 11
Number of divisors8
Sum of divisors σ(n)480
Aliquot sum183sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)180integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 3, 9, 11, 27, 33, 99, 2978 in total
Arithmetic
Representations
Decimal297
Binary1001010019 bits
Octal451
Hexadecimal129
Base 3689
Roman numeralCCXCVII
In wordstwo hundred and ninety-seven
Ordinaltwo hundred and ninety-seventh
Scientific notation2.97 × 10^2
Engineering notation297
Nearest landmarks
Powers & multiples
297 to the power 288,209
297 to the power 326,198,073
297 to the power 47,780,827,681
297 to the power 52,310,905,821,257
First ten multiples297, 594, 891, 1,188, 1,485, 1,782, 2,079, 2,376, 2,673, 2,970
Powers of twoBetween 2^8 (256) and 2^9 (512)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3Yes
Divisible by 4No, remainder 1
Divisible by 5No, remainder 2
Divisible by 6No, remainder 3
Divisible by 7No, remainder 3
Divisible by 8No, remainder 1
Divisible by 9Yes
Divisible by 10No, remainder 7
Divisible by 11Yes
Divisible by 12No, remainder 9
Divisible by 100No, remainder 97
Collatz (3n + 1) trajectory
Steps to reach 173the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps297 → 892 → 446 → 223 → 670 → 335 → 1,006 → 503 → 1,510 → 755 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage29,700%
297% as a decimal2.97
297% of 100297
297% of 1,0002,970
As a fraction of 100297/100
Read another way
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Derived from 297
Other readings
Also reads as
#229977 (colour)
- #229977
- Cyan
- Dark
- Nearest: Sea green
#229977 is a cyan with RGB values 34, 153, 119 and HSL 163°, 64%, 37%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Sea green.
Colour values
#229977#229977
HEX#229977
HEX (short)#297
RGBrgb(34, 153, 119)
RGB (0–1)0.1333, 0.6, 0.4667
RGB percentages13.3%, 60%, 46.7%
HSLhsl(162.9, 63.6%, 36.7%)
HSV / HSBhsv(162.9, 77.8%, 60%)
CMYK77.8%, 0%, 22.2%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,267,511
CSS custom property--colour: #229977;
Brightness & contrast
Relative luminance0.24454WCAG 2.x, 0 is black and 1 is white
Perceived brightness125.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.89:1
Contrast with white3.56:1WCAG normal text: Fail
Contrast with black5.89:1WCAG normal text: AA
Greyscale equivalent#7D7D7D
Inverted#DD6688
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.56:1WCAG large text: AA
Contrast with black, large text5.89:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#992244
Analogous#22993C, #227F99
Triadic#772299, #997722
Split complementary#99227F, #993C22
Tetradic#3C2299, #992244, #7F9922
Tints, shades & saturation
Channel breakdown
R34
G153
B119
Red34 (13.3%)
Green153 (60%)
Blue119 (46.7%)
Hue162.86°
Saturation (HSL)63.64%
Lightness36.67%
Dominant channelGreen
Hex per channelR 22 · G 99 · B 77
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Harmonies
Similar named colours
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