Q: Is 397,638 a Prime Number?
A: No, 397,638 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 397638 can be evenly divided by 1 2 3 6 9 18 22,091 44,182 66,273 132,546 198,819 and 397,638, with no remainder.
Since 397,638 cannot be divided by just 1 and 397,638, it is not a prime number.