Q: Is 687,760 a Prime Number?
A: No, 687,760 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 687760 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 8,597 17,194 34,388 42,985 68,776 85,970 137,552 171,940 343,880 and 687,760, with no remainder.
Since 687,760 cannot be divided by just 1 and 687,760, it is not a prime number.