Q: Is 506,991 a Prime Number?
A: No, 506,991 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 506991 can be evenly divided by 1 3 17 51 9,941 29,823 168,997 and 506,991, with no remainder.
Since 506,991 cannot be divided by just 1 and 506,991, it is not a prime number.