Q: Is 166,243 a Prime Number?
A: No, 166,243 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 166243 can be evenly divided by 1 7 11 17 77 119 127 187 889 1,309 1,397 2,159 9,779 15,113 23,749 and 166,243, with no remainder.
Since 166,243 cannot be divided by just 1 and 166,243, it is not a prime number.