Q: Is 423,781 a Prime Number?
A: Yes, 423,781 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 423781 can be evenly divided by 1 and 423,781, with no remainder.
Since 423,781 can be divided by just 1 and 423,781, it is a prime number.