Q: Is 687,987 a Prime Number?
A: No, 687,987 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 687987 can be evenly divided by 1 3 9 27 83 249 307 747 921 2,241 2,763 8,289 25,481 76,443 229,329 and 687,987, with no remainder.
Since 687,987 cannot be divided by just 1 and 687,987, it is not a prime number.