Q: Is 16,603 a Prime Number?
A: Yes, 16,603 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 16603 can be evenly divided by 1 and 16,603, with no remainder.
Since 16,603 can be divided by just 1 and 16,603, it is a prime number.