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100 is a [[Harshad number]] in base 10, and also in base 4, and in that base it is a [[self-descriptive number]].
100 is a [[Harshad number]] in base 10, and also in base 4, and in that base it is a [[self-descriptive number]].


10<sup>100</sup> = [[googol]] and a [[centillian]] has 100 [[zero]]s (10<sup>303</sup>).
10<sup>100</sup> = [[googol]] and a [[centillion]] has 100 [[zero]]s (10<sup>303</sup>).

==In science==
==In science==



Revision as of 19:24, 25 February 2010

100
Template:Numbers (digits)
Cardinal 100
one hundred
Ordinal 100th
hundredth (or, one hundredth)
Numeral system unary
Factorization
Divisors 1, 2, 4, 5, 10, 20, 25, 50, 100
Greek numeral ρʹ
Roman numeral C
Roman numeral (Unicode) C, ⅽ
Arabic ١٠٠
Bengali ১০০
Chinese numeral 佰,百
Korean
Devanagari १००
Hebrew ק (Kuf)
Khmer ១០០
Thai ร้อย, ๑๐๐
prefixes Hundred
Binary 1100100
Octal 144
Duodecimal 84
Hexadecimal 64

100 (one hundred) (Roman numeral C, for centum) is the natural number following 99 and preceding 101.

In mathematics

One hundred is the square of 10 (in scientific notation it is written as 102). The standard SI prefix for a hundred is "hecto-".

One hundred is the basis of percentages (literally "per hundred"), with 100% being a full amount.

It is the sum of the first nine prime numbers, as well as the sum of four pairs of prime numbers (47 + 53, 17 + 83, 3 + 97, 41 + 59), and the sum of the cubes of the first four integers (100 = 13 + 23 + 33 + 43). Also, 26 + 62 = 100, thus 100 is a Leyland number.

One hundred is also an 18-gonal number. It is divisible by the number of primes below it, 25 in this case. But it can not be expressed as the difference between any integer and the total of coprimes below it, making it a noncototient. However, it can be expressed as a sum of some of its divisors, making it a semiperfect number.

100 is a Harshad number in base 10, and also in base 4, and in that base it is a self-descriptive number.

10100 = googol and a centillion has 100 zeros (10303).

In science

Astronomy

The Messier object M100, a magnitude 10.5 spiral galaxy in the constellation Coma Berenices.

The New General Catalogue object NGC 100, a magnitude 13.3 spiral galaxy in the constellation Pisces.

The Saros number of the solar eclipse series which began on 264 May and ended on 1526 June with a duration of 1262.1 years and 71 solar eclipses. Further, the number of the lunar eclipse series which began on 403 November and ended on 1864 April with a duration of 1460.4 years, and 82 lunar eclipses.

In other fields

U.S. hundred-dollar bill
U.S. hundred-dollar bill

One hundred is also:

Vehicles

  • Audi 100 is a mid-sized automobile produced by Audi from 1968-97.
  • Rover P4 100 produced by The Rover Co. Ltd. from 1960-62.
  • Rover 100 a supermini car that was produced by the Rover Group from 1990-98.

In entertainment

Books

In music

In television

In other entertainment

In sports

See also

References

  • Wells, D. The Penguin Dictionary of Curious and Interesting Numbers London: Penguin Group. (1987): 133