Q: Is 398,431 a Prime Number?
A: No, 398,431 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 398431 can be evenly divided by 1 11 29 319 1,249 13,739 36,221 and 398,431, with no remainder.
Since 398,431 cannot be divided by just 1 and 398,431, it is not a prime number.