Q: Is 521,993 a Prime Number?
A: Yes, 521,993 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 521993 can be evenly divided by 1 and 521,993, with no remainder.
Since 521,993 can be divided by just 1 and 521,993, it is a prime number.