Q: Is 309,123 a Prime Number?
A: No, 309,123 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 309123 can be evenly divided by 1 3 9 27 107 321 963 2,889 11,449 34,347 103,041 and 309,123, with no remainder.
Since 309,123 cannot be divided by just 1 and 309,123, it is not a prime number.