Q: Is 309,987 a Prime Number?
A: No, 309,987 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 309987 can be evenly divided by 1 3 9 27 43 81 89 129 267 387 801 1,161 2,403 3,483 3,827 7,209 11,481 34,443 103,329 and 309,987, with no remainder.
Since 309,987 cannot be divided by just 1 and 309,987, it is not a prime number.