Q: Is 687,708 a Prime Number?
A: No, 687,708 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 687708 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 28 36 42 63 84 126 252 2,729 5,458 8,187 10,916 16,374 19,103 24,561 32,748 38,206 49,122 57,309 76,412 98,244 114,618 171,927 229,236 343,854 and 687,708, with no remainder.
Since 687,708 cannot be divided by just 1 and 687,708, it is not a prime number.