Q: Is 684,340 a Prime Number?
A: No, 684,340 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 684340 can be evenly divided by 1 2 4 5 10 20 34,217 68,434 136,868 171,085 342,170 and 684,340, with no remainder.
Since 684,340 cannot be divided by just 1 and 684,340, it is not a prime number.