100 or one hundred ( Roman numeral : C ) is the natural number following 99 and preceding 101 .
6-498: A hundred is the natural number following 99 and preceding 101. Hundred or hundreds may also refer to: Hundred 100 is the square of 10 (in scientific notation it is written as 10 ). The standard SI prefix for a hundred is " hecto -". 100 is the basis of percentages ( per centum meaning "by the hundred" in Latin), with 100% being a full amount. 100 is a Harshad number in decimal , and also in base-four,
12-418: A base in-which it is also a self-descriptive number . 100 is the sum of the first nine prime numbers , from 2 through 23 . It is also divisible by the number of primes below it, 25 . 100 cannot be expressed as the difference between any integer and the total of coprimes below it, making it a noncototient . 100 has a reduced totient of 20, and an Euler totient of 40. A totient value of 100
18-521: Is 23456789, which contains eight consecutive integers as digits. One hundred is the atomic number of fermium , an actinide , and the last of the heavy metals that can be created through neutron bombardment. On the Celsius scale, 100 degrees is the boiling temperature of pure water at sea level . The Kármán line lies at an altitude of 100 kilometres (62 mi) above the Earth's sea level and
24-493: Is commonly used to define the boundary between Earth's atmosphere and outer space. Most of the world's currencies are divided into 100 subunits; for example, one euro is one hundred cents and one pound sterling is one hundred pence. By specification, 100 euro notes feature a picture of a Rococo gateway on the obverse and a Baroque bridge on the reverse. The U.S. hundred-dollar bill has Benjamin Franklin 's portrait;
30-403: Is obtained from four numbers: 101 , 125 , 202 , and 250 . 100 can be expressed as a sum of some of its divisors, making it a semiperfect number . The geometric mean of its nine divisors is 10 . 100 is the sum of the cubes of the first four positive integers (100 = 1 + 2 + 3 + 4 ). This is related by Nicomachus's theorem to the fact that 100 also equals the square of the sum of
36-617: The first four positive integers: 100 = 10 = (1 + 2 + 3 + 4) . 100 = 2 + 6 , thus 100 is the seventh Leyland number . 100 is also the seventeenth Erdős–Woods number , and the fourth 18- gonal number . The 100th prime number is 541 , which returns 0 {\displaystyle 0} for the Mertens function . It is the 10th star number (whose digit sum also adds to 10 in decimal ). There are exactly 100 prime numbers in base-ten whose digits are in strictly ascending order (e.g. 239, 2357, etc.). The last such prime number
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