Q: Is 679,991 a Prime Number?
A: No, 679,991 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 679991 can be evenly divided by 1 13 19 247 2,753 35,789 52,307 and 679,991, with no remainder.
Since 679,991 cannot be divided by just 1 and 679,991, it is not a prime number.