Nearby Numbers

Positive, nonzero integers within three units

84

Eighty-Four

85

Eighty-Five

86

Eighty-Six

88

Eighty-Eight

89

Eighty-Nine

90

Ninety

Scientific Notation

Scientific notation expresses a quantity as the product of its significand with 10 raised to an integer exponent.

8.7e1

Reciprocal

A number multiplied with its reciprocal is one.

0.011494252873563218

The reciprocal of 87.

Palindrome?

A numerical palindrome has the same value when all of its digits are reversed.

The number 87 is not a palindrome.

Not A Prime Number

A prime number is a positive integer that is divisible only by itself and one.

Eighty-seven is a composite number with 4 total factors (including 1 and itself).   See primes in Base 10 Decimal

A Composite

Composites have more than just these two factors.

Eighty-seven is a composite number with 4 total factors (including 1 and itself).

Prime Factors

3

Three

29

Twenty-Nine

Prime Factorization

The prime factorization of a positive integer is the unique list of prime factors together with their multiplicities

31 · 291 = 87

Base Conversions

The number eighty-seven in 35 different bases