# 100 (number)

(Redirected from One hundred)
 ← 99 100 101 →
Cardinal one hundred
Ordinal 100th
(one hundredth)
Factorization 22· 52
Divisors 1, 2, 4, 5, 10, 20, 25, 50, 100
Roman numeral C
Unicode symbol(s) C, ⅽ
Binary 11001002
Ternary 102013
Quaternary 12104
Quinary 4005
Senary 2446
Octal 1448
Duodecimal 8412
Vigesimal 5020
Base 36 2S36
Greek numeral ρ
Arabic ١٠٠
Bengali ১০০
Chinese numeral 佰,百
Korean
Devanagari १००
Hebrew ק (Kuf)
Khmer ១០០
Tamil ௱, க00
Thai ร้อย, ๑๐๐

100 (one hundred) (Roman numeral Ⅽ, reinforced by Latin centum) is the natural number following 99 and preceding 101.

## In mathematics

100 is the square of 10 (in scientific notation it is written as 102). The standard SI prefix for a hundred is "hecto-".

100 is the basis of percentages (per cent meaning "per hundred" in Latin), with 100% being a full amount.

100 is the sum of the first nine prime numbers, as well as the sum of some pairs of prime numbers e.g., 3 + 97, 11 + 89, 17 + 83, 29 + 71, 41 + 59, and 47 + 53.

100 is the sum of the cubes of the first four integers (100 = 13 + 23 + 33 + 43). This is related by Nicomachus's theorem to the fact that 100 also equals the square of the sum of the first four integers: 100 = 102 = (1 + 2 + 3 + 4)2.[1]

26 + 62 = 100, thus 100 is a Leyland number.

100 is an 18-gonal number. It is divisible by the number of primes below it, 25 in this case. It can not be expressed as the difference between any integer and the total of coprimes below it, making it a noncototient. 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.

There are exactly 100 prime numbers whose digits are in strictly ascending order (e.g. 239, 2357 etc.).

100 is the smallest number whose common logarithm is a prime number (i.e. 10n for which n is prime).

## In science

The atomic number of fermium is 100.

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 above the Earth's sea level and is commonly used to define the boundary between Earth's atmosphere and outer space.

## In religion

• There are 100 blasts of the Shofar heard in the service of Rosh Hashana, the Jewish New Year.[2]
• A religious Jew is expected to utter at least 100 blessings daily.[3]

## In politics

The United States Senate has 100 Senators.

## In money

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.

The U.S. hundred-dollar bill has Benjamin Franklin's portrait; the "Benjamin" is the largest U.S. bill in print. American savings bonds of \$100 have Thomas Jefferson's portrait, while American \$100 treasury bonds have Andrew Jackson's portrait.

The U.S. hundred-dollar bill, Series 2009.

## In other fields

One hundred is also:

## In entertainment

When a TV series reaches 100 episodes, it is generally considered viable for syndication. (For shows picked up midseason, this point is generally reached during a prime time series' 5th season).