Q: Is 309,978 a Prime Number?
A: No, 309,978 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 309978 can be evenly divided by 1 2 3 6 9 17 18 34 51 102 153 306 1,013 2,026 3,039 6,078 9,117 17,221 18,234 34,442 51,663 103,326 154,989 and 309,978, with no remainder.
Since 309,978 cannot be divided by just 1 and 309,978, it is not a prime number.