Q: Is 678,509 a Prime Number?
A: No, 678,509 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 678509 can be evenly divided by 1 13 19 41 67 247 533 779 871 1,273 2,747 10,127 16,549 35,711 52,193 and 678,509, with no remainder.
Since 678,509 cannot be divided by just 1 and 678,509, it is not a prime number.