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.