Q: Is 428,623 a Prime Number?
A: No, 428,623 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 428623 can be evenly divided by 1 13 32,971 and 428,623, with no remainder.
Since 428,623 cannot be divided by just 1 and 428,623, it is not a prime number.