Q: Is 409,978 a Prime Number?
A: No, 409,978 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 409978 can be evenly divided by 1 2 359 571 718 1,142 204,989 and 409,978, with no remainder.
Since 409,978 cannot be divided by just 1 and 409,978, it is not a prime number.