Q: Is 491,503 a Prime Number?
A: Yes, 491,503 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 491503 can be evenly divided by 1 and 491,503, with no remainder.
Since 491,503 can be divided by just 1 and 491,503, it is a prime number.