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IN MATHEMATICS One hundred is the square of 10 (in Scientific Notation it is written as ). 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 ]] One hundred is also:
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