Number
100
- Positive
- Even
- Composite
- Perfect square
- 3 digits
100 is an even 3-digit integer and a composite number. It has 9 divisors and a digital root of 1.
Number properties
ParityEvendivisible by 2
SignPositive
PrimalityComposite
Absolute value100
Digit count3
Digit sum1
Digital root1repeated digit sum
PalindromicNoreads differently backwards
Perfect squareYes, 10²
Happy numberYessquared-digit sums reach 1
Harshad numberYesdivisible by its own digit sum
Factors & divisors
Prime factorisation2^2 × 5^2
Distinct prime factors22, 5
Number of divisors9
Sum of divisors σ(n)217
Aliquot sum117sum of the proper divisors
ClassificationAbundantthe aliquot sum exceeds the number
Euler's totient φ(n)40integers below n that share no factor with it
SquarefreeNohas a repeated prime factor
All divisors1, 2, 4, 5, 10, 20, 25, 50, 1009 in total
Arithmetic
Representations
Decimal100
Binary11001007 bits
Octal144
Hexadecimal64
Base 362S
Roman numeralC
In wordsone hundred
Ordinalone hundredth
Scientific notation1 × 10^2
Engineering notation100
Nearest landmarks
Powers & multiples
100 to the power 210,000
100 to the power 31,000,000
100 to the power 4100,000,000
100 to the power 510,000,000,000
First ten multiples100, 200, 300, 400, 500, 600, 700, 800, 900, 1,000
Powers of twoBetween 2^6 (64) and 2^7 (128)
Divisibility tests
Divisible by 2Yes
Divisible by 3No, remainder 1
Divisible by 4Yes
Divisible by 5Yes
Divisible by 6No, remainder 4
Divisible by 7No, remainder 2
Divisible by 8No, remainder 4
Divisible by 9No, remainder 1
Divisible by 10Yes
Divisible by 11No, remainder 1
Divisible by 12No, remainder 4
Divisible by 100Yes
Collatz (3n + 1) trajectory
Steps to reach 125the total stopping time
Highest value reached100
Reaches 1Yesthe Collatz conjecture says every positive integer does, but it is unproven
First steps100 → 50 → 25 → 76 → 38 → 19 → 58 → 29 → 88 → 44 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage10,000%
100% as a decimal1
100% of 100100
100% of 1,0001,000
As a fraction of 100100/100
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Derived from 100
Other readings
Also reads as
#110000 (colour)
- #110000
- Red
- Dark
- Nearest: Black
#110000 is a red with RGB values 17, 0, 0 and HSL 0°, 100%, 3%. It is a dark colour, so white text on it reaches 20.5:1 contrast (AAA for normal text). The nearest named colour is Black.
Colour values
#110000#110000
HEX#110000
HEX (short)#100
RGBrgb(17, 0, 0)
RGB (0–1)0.0667, 0, 0
RGB percentages6.7%, 0%, 0%
HSLhsl(0, 100%, 3.3%)
HSV / HSBhsv(0, 100%, 6.7%)
CMYK0%, 100%, 100%, 93.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,114,112
CSS custom property--colour: #110000;
Brightness & contrast
Relative luminance0.00119WCAG 2.x, 0 is black and 1 is white
Perceived brightness9.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.51:1
Contrast with white20.51:1WCAG normal text: AAA
Contrast with black1.02:1WCAG normal text: Fail
Greyscale equivalent#040404
Inverted#EEFFFF
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.51:1WCAG large text: AAA
Contrast with black, large text1.02:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#001111
Analogous#110009, #110900
Triadic#001100, #000011
Split complementary#001109, #000911
Tetradic#091100, #001111, #090011
Tints, shades & saturation
Channel breakdown
R17
G0
B0
Red17 (6.7%)
Green0 (0%)
Blue0 (0%)
Hue0°
Saturation (HSL)100%
Lightness3.33%
Dominant channelRed
Hex per channelR 11 · G 00 · B 00
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Also reads as
HTTP 100 Continue (http status)
- 100 Continue
- Informational
- RFC 9110
HTTP 100 Continue is a informational response: the client should continue sending the request body. It is defined in RFC 9110, and the request was received and the process is continuing.
What it means
Status code100
Reason phraseContinueadvisory only; clients must not depend on the wording
Class1xx Informational
MeaningThe client should continue sending the request body
Defined inRFC 9110
Cacheable by defaultNoonly cacheable if the response says so explicitly
How clients behave
Indicates an errorNo
Whose faultNeither, it succeeded
Body expectedNo
The 1xx class
Class meaningThe request was received and the process is continuing
Codes in this class4
Lowest in class100
Highest in class103
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