Q: Is 684,400 a Prime Number?
A: No, 684,400 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 684400 can be evenly divided by 1 2 4 5 8 10 16 20 25 29 40 50 58 59 80 100 116 118 145 200 232 236 290 295 400 464 472 580 590 725 944 1,160 1,180 1,450 1,475 1,711 2,320 2,360 2,900 2,950 3,422 4,720 5,800 5,900 6,844 8,555 11,600 11,800 13,688 17,110 23,600 27,376 34,220 42,775 68,440 85,550 136,880 171,100 342,200 and 684,400, with no remainder.
Since 684,400 cannot be divided by just 1 and 684,400, it is not a prime number.