Q: Is 338,643 a Prime Number?
A: No, 338,643 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 338643 can be evenly divided by 1 3 9 191 197 573 591 1,719 1,773 37,627 112,881 and 338,643, with no remainder.
Since 338,643 cannot be divided by just 1 and 338,643, it is not a prime number.