Q: Is 999,991 a Prime Number?
A: No, 999,991 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 999991 can be evenly divided by 1 17 59 997 1,003 16,949 58,823 and 999,991, with no remainder.
Since 999,991 cannot be divided by just 1 and 999,991, it is not a prime number.