The Number

991

Nine Hundred and Ninety-One

In Base 20 Vigesimal Is

29b20

The numbers with a 20 subscript use Base 20 Vigesimal notation.

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

Nearby Numbers

Positive, nonzero integers within three units

988
29820
Nine Hundred and Eighty-Eight in Base 20 Vigesimal
989
29920
Nine Hundred and Eighty-Nine in Base 20 Vigesimal
990
29a20
Nine Hundred and Ninety in Base 20 Vigesimal
992
29c20
Nine Hundred and Ninety-Two in Base 20 Vigesimal
993
29d20
Nine Hundred and Ninety-Three in Base 20 Vigesimal
994
29e20
Nine Hundred and Ninety-Four in Base 20 Vigesimal

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.

0.0081914c8cf1i720

The reciprocal of 991 in Base 20 Vigesimal.

Palindrome?

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

The number 29b20 is not 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 20 Vigesimal

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
29b20
Nine Hundred and Ninety-One in Base 20 Vigesimal

Prime Factorization

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

29b201 = 29b20

Base Conversions

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