Q: Is 491,781 a Prime Number?
A: No, 491,781 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 491781 can be evenly divided by 1 3 163,927 and 491,781, with no remainder.
Since 491,781 cannot be divided by just 1 and 491,781, it is not a prime number.