The Number

991

Nine Hundred and Ninety-One

In Base 30 Trigesimal Is

13130

The numbers with a 30 subscript use Base 30 Trigesimal notation.

For more familiar numbers: See Nine Hundred and Ninety-One in Base 10 Decimal

Nearby Numbers

Positive, nonzero integers within three units

988
12s30
Nine Hundred and Eighty-Eight in Base 30 Trigesimal
989
12t30
Nine Hundred and Eighty-Nine in Base 30 Trigesimal
990
13030
Nine Hundred and Ninety in Base 30 Trigesimal
992
13230
Nine Hundred and Ninety-Two in Base 30 Trigesimal
993
13330
Nine Hundred and Ninety-Three in Base 30 Trigesimal
994
13430
Nine Hundred and Ninety-Four in Base 30 Trigesimal

Scientific Notation

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

9.91e2

Reciprocal

A number multiplied with its reciprocal is one.

0.00r7akhgm6htd30

The reciprocal of 991 in Base 30 Trigesimal.

Palindrome?

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

The number 13130 is a palindrome.

A Prime Number

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

Nine hundred and ninety-one is the 167th prime number.   See primes in Base 30 Trigesimal

Not A Composite

Composites have more than just these two factors.

Nine Hundred and Ninety-One is not a composite number because it has exactly two factors: One and Nine Hundred and Ninety-One

Prime Factors

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

The number nine hundred and ninety-one has the following 1 prime factor:

991
13130
Nine Hundred and Ninety-One in Base 30 Trigesimal

Prime Factorization

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

131301 = 13130

Base Conversions

The number nine hundred and ninety-one in 35 different bases