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

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 4 pairs of prime numbers (47 + 53, 17 + 83, 3 + 97, 41 + 59), and the sum of the cubes of the first four integers (100 = 1^3 + 2^3 + 3^3 + 4^3). Also, 2^6 + 6^2 = 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.

On October 07 2009 14:34 Nitrogen wrote:
SUDDENLY THERE WERE BACKPACK SLOTS

ONE HUNDRED OF THEM