# 6c13

The numbers with a 13 subscript use Base 13 Tridecimal notation.

For more familiar numbers: See Ninety in Base 10 Decimal

## Nearby Numbers

Positive, nonzero integers within three units

87
6913
Eighty-Seven in Base 13 Tridecimal
88
6a13
Eighty-Eight in Base 13 Tridecimal
89
6b13
Eighty-Nine in Base 13 Tridecimal
91
7013
Ninety-One in Base 13 Tridecimal
92
7113
Ninety-Two in Base 13 Tridecimal
93
7213
Ninety-Three in Base 13 Tridecimal

## Scientific Notation

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

## Reciprocal

A number multiplied with its reciprocal is one.

### `0.01b546298a7101b613`

The reciprocal of 90 in Base 13 Tridecimal.

## Palindrome?

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

The number 6c13 is not a palindrome.

## Not A Prime Number

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

Ninety is a composite number with 12 total factors (including 1 and itself).   See primes in Base 13 Tridecimal

## A Composite

Composites have more than just these two factors.

Ninety is a composite number with 12 total factors (including 1 and itself).

## Prime Factors

The prime factors of a positive integer are the integers that divide it exactly and are also prime.

The number ninety has the following 3 prime factors:

2
213
Two in Base 13 Tridecimal
3
313
Three in Base 13 Tridecimal
5
513
Five in Base 13 Tridecimal

## Prime Factorization

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

## Base Conversions

The number ninety in 35 different bases