Q: Is 636,920 a Prime Number?
A: No, 636,920 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 636920 can be evenly divided by 1 2 4 5 8 10 20 40 15,923 31,846 63,692 79,615 127,384 159,230 318,460 and 636,920, with no remainder.
Since 636,920 cannot be divided by just 1 and 636,920, it is not a prime number.