100 (number)

100 (the Roman numeral is C for centum) is the natural number following 99 and preceding 101.

List of numbers — Integers

<< 100 101 102 103 104 105 106 107 108 109 >>

Cardinal

one hundred

Ordinal

100th (one hundredth)

Factorization

Divisors

2, 4, 5, 10,
20, 40, 50

Roman numeral

Binary

1100100

Hexadecimal

Table of contents

1 In mathematics
2 In other fields
3 Other numbers in the 100s

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-". It 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 a octadecagonal number.

In other fields

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 number of subunits into which many of the world's currencies are divided; for example, one euro is one hundred cents and one pound sterling is one hundred pence.
The number of verses in the pop song 99 Bottles of Beer
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.
The year AD 100 or 100 BC.

Other numbers in the 100s

One hundred eleven has its own article.

One hundred seventy five has its own article.