Q: Is 403,439 a Prime Number?
A: Yes, 403,439 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 403439 can be evenly divided by 1 and 403,439, with no remainder.
Since 403,439 can be divided by just 1 and 403,439, it is a prime number.