From Wikipedia, the free encyclopedia.
One hundred (100; the Roman numeral is C for centum) is the natural number following ninety-nine and preceding one hundred one. The square of 10 (in scientific notation it is written as 102), it is a composite number, with its divisors being 2, 4, 5, 10, 20, 40 and 50, and its factorization is
The standard SI prefix for a hundred is "hecto-". This number is the sum of the first nine prime numbers, as well as the sum of two prime numbers (47 + 53). 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:
- The atomic number of fermium, an actinide.
- In degrees Celsius, the boiling temperature of water at sea level.
- The number of years in a century.
- The number of pounds in an American short hundredweight.
- The denomination of the U.S. dollar with Benjamin Franklin's portrait.
- The denomination of American savings bonds with Thomas Jefferson's portrait.
- The denomination of American treasury bonds with Andrew Jackson's portrait.
This article is about the number. For the year AD 100, see 100.
