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100 (number)





IN MATHEMATICS

One hundred is the square of 10 (in Scientific Notation it is written as 10^2). The standard SI Prefix for a hundred is " Hecto -".

It is the sum of the first nine Prime Numbers , as well as the sum of two prime numbers (47 + 53), and the sum of the cubes of the first four integers. Also, 26 + 62 = 100, thus 100 is a Leyland Number .

But perhaps this number is most important as the basis of percentages (literally "per hundred"), with 100% being a full amount.

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 Coprime s below it, making it a Noncototient .

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


IN 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 .



IN OTHER FIELDS

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One hundred is also:



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