Q: Is 671,891 a Prime Number?
A: No, 671,891 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 671891 can be evenly divided by 1 11 17 187 3,593 39,523 61,081 and 671,891, with no remainder.
Since 671,891 cannot be divided by just 1 and 671,891, it is not a prime number.