Q: Is 843,400 a Prime Number?
A: No, 843,400 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 843400 can be evenly divided by 1 2 4 5 8 10 20 25 40 50 100 200 4,217 8,434 16,868 21,085 33,736 42,170 84,340 105,425 168,680 210,850 421,700 and 843,400, with no remainder.
Since 843,400 cannot be divided by just 1 and 843,400, it is not a prime number.