Q: Is 538,661 a Prime Number?
A: No, 538,661 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 538661 can be evenly divided by 1 43 12,527 and 538,661, with no remainder.
Since 538,661 cannot be divided by just 1 and 538,661, it is not a prime number.