991
Number 991 properties
- 991 is an odd number.
- 991 is a prime number, which means it is only divisible by 1 and itself.
Number 991 - properties and curiosities
991 (number)
Prime factorization
Prime factorization of 991: 991.
Divisors
Divisor count: 2
1, 991
Factors of 991 are: 1, 991.
Representations
In octal, 991 is represented as 1737.
In binary, 991 is represented as 1111011111.
In hex, 991 is represented as 3DF.
Roman numeral: CMXCI
Curiosities
- 991 is part of the infinite sequence of prime numbers.
Related numbers
Quick answers
Is 991 prime?
Yes, 991 is prime.
What are the factors of 991?
1, 991
What is 991 in binary?
1111011111