Q: Is 636,624 a Prime Number?
A: No, 636,624 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 636624 can be evenly divided by 1 2 3 4 6 8 9 12 16 18 24 36 48 72 144 4,421 8,842 13,263 17,684 26,526 35,368 39,789 53,052 70,736 79,578 106,104 159,156 212,208 318,312 and 636,624, with no remainder.
Since 636,624 cannot be divided by just 1 and 636,624, it is not a prime number.