Q: Is 687,345 a Prime Number?
A: No, 687,345 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 687345 can be evenly divided by 1 3 5 15 45,823 137,469 229,115 and 687,345, with no remainder.
Since 687,345 cannot be divided by just 1 and 687,345, it is not a prime number.