Q: Is 339,643 a Prime Number?
A: No, 339,643 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 339643 can be evenly divided by 1 17 19,979 and 339,643, with no remainder.
Since 339,643 cannot be divided by just 1 and 339,643, it is not a prime number.