Q: Is 688,490 a Prime Number?
A: No, 688,490 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 688490 can be evenly divided by 1 2 5 10 11 22 55 110 121 242 569 605 1,138 1,210 2,845 5,690 6,259 12,518 31,295 62,590 68,849 137,698 344,245 and 688,490, with no remainder.
Since 688,490 cannot be divided by just 1 and 688,490, it is not a prime number.