Q: Is 637,431 a Prime Number?
A: No, 637,431 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 637431 can be evenly divided by 1 3 19 53 57 159 211 633 1,007 3,021 4,009 11,183 12,027 33,549 212,477 and 637,431, with no remainder.
Since 637,431 cannot be divided by just 1 and 637,431, it is not a prime number.