Q: Is 627,991 a Prime Number?
A: No, 627,991 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 627991 can be evenly divided by 1 7 13 67 91 103 469 721 871 1,339 6,097 6,901 9,373 48,307 89,713 and 627,991, with no remainder.
Since 627,991 cannot be divided by just 1 and 627,991, it is not a prime number.