Q: Is 508,991 a Prime Number?
A: No, 508,991 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 508991 can be evenly divided by 1 7 19 43 89 133 301 623 817 1,691 3,827 5,719 11,837 26,789 72,713 and 508,991, with no remainder.
Since 508,991 cannot be divided by just 1 and 508,991, it is not a prime number.