Q: Is 991,231 a Prime Number?
A: No, 991,231 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 991231 can be evenly divided by 1 23 71 607 1,633 13,961 43,097 and 991,231, with no remainder.
Since 991,231 cannot be divided by just 1 and 991,231, it is not a prime number.