Recognised as Number
995
- Positive
- Odd
- Composite
- 3 digits
995 is an odd 3-digit integer and a composite number. It has 4 divisors and a digital root of 5.
Number properties
ParityOddnot divisible by 2
SignPositive
PrimalityComposite
Absolute value995
Digit count3
Digit sum23
Digit product405
Multiplicative persistence2times the digit product can be taken before one digit is left
Digital root5repeated digit sum
PalindromicNoreads differently backwards
Happy numberNosquared-digit sums reach 1
Harshad numberNodivisible by its own digit sum
Factors & divisors
Prime factorisation5 × 199
Distinct prime factors25, 199
Number of divisors4
Sum of divisors σ(n)1,200
Aliquot sum205sum of the proper divisors
ClassificationDeficientthe aliquot sum is less than the number
Euler's totient φ(n)792integers below n that share no factor with it
Carmichael function λ(n)396the smallest exponent with aˣ ≡ 1 for every unit; smaller than φ(n) = 792
Möbius function μ(n)+12 distinct prime factors, an even number of them
SquarefreeYesno repeated prime factor
All divisors1, 5, 199, 9954 in total
Arithmetic
Representations
Decimal995
Binary111110001110 bits
Octal1743
Hexadecimal3E3
Base 36RN
Roman numeralCMXCV
In wordsnine hundred and ninety-five
Ordinalnine hundred and ninety-fifth
Scientific notation9.95 × 10^2
Engineering notation995
In other bases
Ternary1100212base 3; the most digit-efficient integer base after e: 7 digits
Quinary12440base 5; one hand: 5 digits
Septenary2621base 7: 4 digits
Nonary1325base 9; each digit is two ternary digits: 4 digits
Duodecimal6abbase 12; divides by 2, 3, 4 and 6, which is why eggs and inches come in twelves: 3 digits
Vigesimal29fbase 20; hands and feet, and the Mayan and Yoruba systems: 3 digits
Sexagesimal16:35base 60; Babylonian, and still how an hour and a circle are divided: 2 digits
Balanced ternary11010TTdigits −1, 0 and +1 written T, 0 and 1; negation is swapping T and 1, so no sign is needed
Negabinary10000100111base −2; place values alternate 1, −2, 4, −8, so every integer has exactly one form without a sign
Bit-level
0000001111100011
Bit length10 bitsto write the magnitude
Set bits7the population count, or Hamming weight
Zero bits3within that length
Bit parityodd7 set bits, so odd; not the same as the number itself being odd
Highest set bitbit 9worth 512
Lowest set bitbit 00 trailing zeros
Power of twoNo
Bytes203 e3
Gray code1000010010n XOR (n >> 1); successive values differ in exactly one bit
At each machine width
16-bit0000001111100011
32-bit00000000000000000000001111100011
64-bit0000000000000000000000000000000000000000000000000000001111100011
One's complement1111110000011100at 16 bits, every bit flipped
Bits reversed1100011111000000at 16 bits
Rotated left by 10000011111000110at 16 bits, wrapping
Shifted left by 111111000110= 1,990, no wrap
Shifted right by 1111110001= 497, discarding the low bit
These bits as a double4.91595318 × 10^-321≈IEEE-754 binary64 reinterpretation of the same 64 bits (subnormal)
Nearest landmarks
Powers & multiples
995 to the power 2990,025
995 to the power 3985,074,875
995 to the power 4980,149,500,625
995 to the power 5975,248,753,121,875
First ten multiples995, 1,990, 2,985, 3,980, 4,975, 5,970, 6,965, 7,960, 8,955, 9,950
Powers of twoBetween 2^9 (512) and 2^10 (1,024)
Divisibility tests
Divisible by 2No, remainder 1
Divisible by 3No, remainder 2
Divisible by 4No, remainder 3
Divisible by 5Yes
Divisible by 6No, remainder 5
Divisible by 7No, remainder 1
Divisible by 8No, remainder 3
Divisible by 9No, remainder 5
Divisible by 10No, remainder 5
Divisible by 11No, remainder 5
Divisible by 12No, remainder 11
Divisible by 100No, remainder 95
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 steps995 → 2,986 → 1,493 → 4,480 → 2,240 → 1,120 → 560 → 280 → 140 → 70 → …
Last steps… → 5 → 16 → 8 → 4 → 2 → 1
As a percentage & fraction
As a percentage99,500%
995% as a decimal9.95
995% of 100995
995% of 1,0009,950
As a fraction of 100995/100
Read another way
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Derived from 995
Other readings
Also reads as
#999955 (colour)
- #999955
- Yellow
- Dark
- Nearest: Dark khaki
#999955 is a yellow with RGB values 153, 153, 85 and HSL 60°, 29%, 47%. It is a dark colour, so black text on it reaches 7:1 contrast (AAA for normal text). The nearest named colour is Dark khaki.
Colour values
#999955#999955
HEX#999955
HEX (short)#995
RGBrgb(153, 153, 85)
RGB (0–1)0.6, 0.6, 0.3333
RGB percentages60%, 60%, 33.3%
HSLhsl(60, 28.6%, 46.7%)
HSV / HSBhsv(60, 44.4%, 60%)
CMYK0%, 0%, 44.4%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,066,261
CSS custom property--colour: #999955;
Brightness & contrast
Relative luminance0.30211WCAG 2.x, 0 is black and 1 is white
Perceived brightness146.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.04:1
Contrast with white2.98:1WCAG normal text: Fail
Contrast with black7.04:1WCAG normal text: AAA
Greyscale equivalent#949494
Inverted#6666AA
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.98:1WCAG large text: Fail
Contrast with black, large text7.04:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#555599
Analogous#997755, #779955
Triadic#559999, #995599
Split complementary#557799, #775599
Tetradic#559977, #555599, #995577
Tints, shades & saturation
Channel breakdown
R153
G153
B85
Red153 (60%)
Green153 (60%)
Blue85 (33.3%)
Hue60°
Saturation (HSL)28.57%
Lightness46.67%
Dominant channelRed and Green
Hex per channelR 99 · G 99 · B 55
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Harmonies
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