Q: Is 628,407 a Prime Number?
A: No, 628,407 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 628407 can be evenly divided by 1 3 9 13 39 41 117 123 131 369 393 533 1,179 1,599 1,703 4,797 5,109 5,371 15,327 16,113 48,339 69,823 209,469 and 628,407, with no remainder.
Since 628,407 cannot be divided by just 1 and 628,407, it is not a prime number.