Number
101,009
- Positive
- Odd
- Prime
- 6 digits
101,009 is an odd 6-digit integer and a prime number. It has 2 divisors and a digital root of 2.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityPrime
Absolute value101,009
Digit count6
Digit sum11
Digital root2repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation101,009
Distinct prime factors1101,009
Number of divisors2
Sum of divisors σ(n)101,010
Aliquot sum1sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)101,008integers below n that share no factor with it
SquarefreeYesno repeated prime factor
All divisors1, 101,0092 in total
Arithmetic
Representations
Decimal101,009
Binary1100010101001000117 bits
Octal305221
Hexadecimal18A91
Base 3625XT
Roman numeralNot defined above 3,999there is no agreed standard notation
In wordsone hundred and one thousand and nine
Ordinalone hundred and one thousand and ninth
Scientific notation1.01009 × 10^5
Engineering notation101.009 × 10^3
Nearest landmarks
Powers & multiples
101,009 to the power 210,202,818,081
101,009 to the power 31,030,576,451,543,729
101,009 to the power 4104,097,496,793,980,522,561
101,009 to the power 510,514,784,053,663,178,603,364,049
First ten multiples101,009, 202,018, 303,027, 404,036, 505,045, 606,054, 707,063, 808,072, 909,081, 1,010,090
Powers of twoBetween 2^16 (65,536) and 2^17 (131,072)
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 6
Divisible by 8No, remainder 1
Divisible by 9No, remainder 2
Divisible by 10No, remainder 9
Divisible by 11No, remainder 7
Divisible by 12No, remainder 5
Divisible by 100No, remainder 9
Collatz (3n + 1) trajectory
Steps to reach 197the total stopping time
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps101,009 → 303,028 → 151,514 → 75,757 → 227,272 → 113,636 → 56,818 → 28,409 → 85,228 → 42,614 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage10,100,900%
101,009% as a decimal1,010.09
101,009% of 100101,009
101,009% of 1,0001,010,090
As a fraction of 100101,009/100
Read another way
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Derived from 101,009
Also reads as
#101009 (colour)
- #101009
- Yellow
- Dark
- Nearest: Black
#101009 is a yellow with RGB values 16, 16, 9 and HSL 60°, 28%, 5%. It is a dark colour, so white text on it reaches 19.1:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#101009#101009
HEX#101009
RGBrgb(16, 16, 9)
RGB (0–1)0.0627, 0.0627, 0.0353
RGB percentages6.3%, 6.3%, 3.5%
HSLhsl(60, 28%, 4.9%)
HSV / HSBhsv(60, 43.8%, 6.3%)
CMYK0%, 0%, 43.8%, 93.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,052,681
CSS custom property--colour: #101009;
Brightness & contrast
Relative luminance0.005WCAG 2.x, 0 is black and 1 is white
Perceived brightness15.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.09:1
Contrast with white19.09:1WCAG normal text: AAA
Contrast with black1.1:1WCAG normal text: Fail
Greyscale equivalent#0F0F0F
Inverted#EFEFF6
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.09:1WCAG large text: AAA
Contrast with black, large text1.1:1WCAG large text: Fail
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#090910
Analogous#100D09, #0D1009
Triadic#091010, #100910
Split complementary#090D10, #0D0910
Tetradic#09100D, #090910, #10090D
Tints, shades & saturation
Channel breakdown
R16
G16
B9
Red16 (6.3%)
Green16 (6.3%)
Blue9 (3.5%)
Hue60°
Saturation (HSL)28%
Lightness4.9%
Dominant channelRed and Green
Hex per channelR 10 · G 10 · B 09
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page