Q: Is 671,631 a Prime Number?
A: No, 671,631 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 671631 can be evenly divided by 1 3 19 57 11,783 35,349 223,877 and 671,631, with no remainder.
Since 671,631 cannot be divided by just 1 and 671,631, it is not a prime number.