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Encyclopedia > One hundred

100 (the Roman numeral is C for centum) is the natural number following 99 and preceding 101. Prefixes for 100 include hecta- (Greek) and cent- (Latin).

 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, 25, 50
Roman numeral C
Unicode representation of Roman numeral Ⅽ, ⅽ
Binary 1100100
Hexadecimal 64
 Contents

## In mathematics GA_googleFillSlot("encyclopedia_square");

One hundred is the square of 10 (in scientific notation it is written as 102). 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), and the sum of the cubes of the first four integers.

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 an 18-gonal number and a Harshad 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 coprimes below it, making it a noncototient.

## In other fields

One hundred is also:

## Other numbers in the 100s

• One hundred eleven has its own article.
• One hundred seventy four is a semi-meandric number
• One hundred seventy five has its own article.

## See also

Results from FactBites:

 Hundred (division) - Wikipedia, the free encyclopedia (592 words) In England a hundred was the division of a shire for administrative, military and judicial purposes under the common law. Above the hundred was the shire under the control of a shire-reeve (or sheriff). The hundred was also used as a division of the county in some of the English colonies in North America, especially in Maryland and in Delaware.
More results at FactBites »

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