Q: Is 687,340 a Prime Number?
A: No, 687,340 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 687340 can be evenly divided by 1 2 4 5 10 20 34,367 68,734 137,468 171,835 343,670 and 687,340, with no remainder.
Since 687,340 cannot be divided by just 1 and 687,340, it is not a prime number.