Q: Is 16,623 a Prime Number?
A: No, 16,623 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 16623 can be evenly divided by 1 3 9 1,847 5,541 and 16,623, with no remainder.
Since 16,623 cannot be divided by just 1 and 16,623, it is not a prime number.