Q: Is 688,072 a Prime Number?
A: No, 688,072 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 688072 can be evenly divided by 1 2 4 7 8 11 14 22 28 44 56 77 88 154 308 616 1,117 2,234 4,468 7,819 8,936 12,287 15,638 24,574 31,276 49,148 62,552 86,009 98,296 172,018 344,036 and 688,072, with no remainder.
Since 688,072 cannot be divided by just 1 and 688,072, it is not a prime number.