Q: Is 16,399 a Prime Number?
A: No, 16,399 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 16399 can be evenly divided by 1 23 31 529 713 and 16,399, with no remainder.
Since 16,399 cannot be divided by just 1 and 16,399, it is not a prime number.