Q: Is 620,397 a Prime Number?
A: No, 620,397 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 620397 can be evenly divided by 1 3 9 29 87 261 2,377 7,131 21,393 68,933 206,799 and 620,397, with no remainder.
Since 620,397 cannot be divided by just 1 and 620,397, it is not a prime number.