Q: Is 681,003 a Prime Number?
A: No, 681,003 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 681003 can be evenly divided by 1 3 9 17 51 153 4,451 13,353 40,059 75,667 227,001 and 681,003, with no remainder.
Since 681,003 cannot be divided by just 1 and 681,003, it is not a prime number.