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Information About

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 -".

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 two prime numbers (47 + 53), 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 Coprime s 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 .


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 13 and ended on 1526 June 10 with a duration of 1262.1 years and 71 solar eclipses. Further, the number of the Lunar Eclipse series which began on 403 November 15 and ended on 1864 April 22 with a duration of 1460.4 years, and 82 lunar eclipses.


IN OTHER FIELDS

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One hundred is also:


SEE ALSO



REFERENCES


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