Q: Is 393,421 a Prime Number?
A: No, 393,421 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 393421 can be evenly divided by 1 7 31 37 49 217 259 343 1,147 1,519 1,813 8,029 10,633 12,691 56,203 and 393,421, with no remainder.
Since 393,421 cannot be divided by just 1 and 393,421, it is not a prime number.