Q: Is 991,171 a Prime Number?
A: Yes, 991,171 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 991171 can be evenly divided by 1 and 991,171, with no remainder.
Since 991,171 can be divided by just 1 and 991,171, it is a prime number.