Q: Is 397,820 a Prime Number?
A: No, 397,820 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 397820 can be evenly divided by 1 2 4 5 10 20 19,891 39,782 79,564 99,455 198,910 and 397,820, with no remainder.
Since 397,820 cannot be divided by just 1 and 397,820, it is not a prime number.