Q: Is 170,991 a Prime Number?
A: No, 170,991 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 170991 can be evenly divided by 1 3 9 27 81 2,111 6,333 18,999 56,997 and 170,991, with no remainder.
Since 170,991 cannot be divided by just 1 and 170,991, it is not a prime number.