Q: Is 671,864 a Prime Number?
A: No, 671,864 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 671864 can be evenly divided by 1 2 4 8 83,983 167,966 335,932 and 671,864, with no remainder.
Since 671,864 cannot be divided by just 1 and 671,864, it is not a prime number.