Q: Is 678,490 a Prime Number?
A: No, 678,490 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 678490 can be evenly divided by 1 2 5 10 19 38 95 190 3,571 7,142 17,855 35,710 67,849 135,698 339,245 and 678,490, with no remainder.
Since 678,490 cannot be divided by just 1 and 678,490, it is not a prime number.