Q: Is 5,091,721 a Prime Number?
A: No, 5,091,721 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 5091721 can be evenly divided by 1 17 299,513 and 5,091,721, with no remainder.
Since 5,091,721 cannot be divided by just 1 and 5,091,721, it is not a prime number.