Q: Is 689,728 a Prime Number?
A: No, 689,728 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 689728 can be evenly divided by 1 2 4 8 13 16 26 32 52 64 104 208 416 829 832 1,658 3,316 6,632 10,777 13,264 21,554 26,528 43,108 53,056 86,216 172,432 344,864 and 689,728, with no remainder.
Since 689,728 cannot be divided by just 1 and 689,728, it is not a prime number.