Number 991 - properties and curiosities

Nine hundred ninety one

991 is an odd number.

991 is a prime number, which means it is only divisible by 1 and itself.

In binary, 991 is represented as 1111011111.

In hex, 991 is represented as 3df.

Prime factorization of 991: 991.

Factors of 991 are: 1, 991.