Q: Is 672,391 a Prime Number?
A: No, 672,391 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 672391 can be evenly divided by 1 19 43 817 823 15,637 35,389 and 672,391, with no remainder.
Since 672,391 cannot be divided by just 1 and 672,391, it is not a prime number.