Q: Is 991,063 a Prime Number?
A: Yes, 991,063 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 991063 can be evenly divided by 1 and 991,063, with no remainder.
Since 991,063 can be divided by just 1 and 991,063, it is a prime number.