Q: Is 400,843 a Prime Number?
A: No, 400,843 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 400843 can be evenly divided by 1 17 19 73 289 323 1,241 1,387 5,491 21,097 23,579 and 400,843, with no remainder.
Since 400,843 cannot be divided by just 1 and 400,843, it is not a prime number.