Q: Is 689,840 a Prime Number?
A: No, 689,840 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 689840 can be evenly divided by 1 2 4 5 8 10 16 20 40 80 8,623 17,246 34,492 43,115 68,984 86,230 137,968 172,460 344,920 and 689,840, with no remainder.
Since 689,840 cannot be divided by just 1 and 689,840, it is not a prime number.