Q: Is 478,399 a Prime Number?
A: Yes, 478,399 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 478399 can be evenly divided by 1 and 478,399, with no remainder.
Since 478,399 can be divided by just 1 and 478,399, it is a prime number.