Q: Is 397,431 a Prime Number?
A: No, 397,431 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 397431 can be evenly divided by 1 3 9 44,159 132,477 and 397,431, with no remainder.
Since 397,431 cannot be divided by just 1 and 397,431, it is not a prime number.