Number
149
- Positive
- Odd
- Prime
- 3 digits
149 is an odd 3-digit integer and a prime number. It has 2 divisors and a digital root of 5.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value149
Digit count3
Digit sum14
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation149
Distinct prime factors1149
Number of divisors2
Sum of divisors σ(n)150
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)148integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 1492 in total
Arithmetic
Representations
Decimal149
Binary100101018 bits
Octal225
Hexadecimal95
Base 3645
Roman numeralCXLIX
In wordsone hundred and forty-nine
Ordinalone hundred and forty-ninth
Scientific notation1.49 × 10^2
Engineering notation149
Nearest landmarks
Powers & multiples
149 to the power 222,201
149 to the power 33,307,949
149 to the power 4492,884,401
149 to the power 573,439,775,749
First ten multiples149, 298, 447, 596, 745, 894, 1,043, 1,192, 1,341, 1,490
Powers of twoBetween 2^7 (128) and 2^8 (256)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 1
Divisible by 5No, remainder 4
Divisible by 6No, remainder 5
Divisible by 7No, remainder 2
Divisible by 8No, remainder 5
Divisible by 9No, remainder 5
Divisible by 10No, remainder 9
Divisible by 11No, remainder 6
Divisible by 12No, remainder 5
Divisible by 100No, remainder 49
Collatz (3n + 1) trajectory
Steps to reach 123the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps149 → 448 → 224 → 112 → 56 → 28 → 14 → 7 → 22 → 11 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage14,900%
149% as a decimal1.49
149% of 100149
149% of 1,0001,490
As a fraction of 100149/100
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Derived from 149
Other readings
Also reads as
#114499 (colour)
- #114499
- Blue
- Dark
- Nearest: Dark slateblue
#114499 is a blue with RGB values 17, 68, 153 and HSL 218°, 80%, 33%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.
Colour values
#114499#114499
HEX#114499
HEX (short)#149
RGBrgb(17, 68, 153)
RGB (0–1)0.0667, 0.2667, 0.6
RGB percentages6.7%, 26.7%, 60%
HSLhsl(217.5, 80%, 33.3%)
HSV / HSBhsv(217.5, 88.9%, 60%)
CMYK88.9%, 55.6%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,131,673
CSS custom property--colour: #114499;
Brightness & contrast
Relative luminance0.06553WCAG 2.x, 0 is black and 1 is white
Perceived brightness74 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.09:1
Contrast with white9.09:1WCAG normal text: AAA
Contrast with black2.31:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#EEBB66
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.09:1WCAG large text: AAA
Contrast with black, large text2.31:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#996611
Analogous#118899, #221199
Triadic#991144, #449911
Split complementary#992211, #889911
Tetradic#991188, #996611, #119922
Tints, shades & saturation
Channel breakdown
R17
G68
B153
Red17 (6.7%)
Green68 (26.7%)
Blue153 (60%)
Hue217.5°
Saturation (HSL)80%
Lightness33.33%
Dominant channelBlue
Hex per channelR 11 · G 44 · B 99
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Harmonies
Similar named colours
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