Q: Is 643,430 a Prime Number?
A: No, 643,430 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 643430 can be evenly divided by 1 2 5 10 37 47 74 94 185 235 370 470 1,369 1,739 2,738 3,478 6,845 8,695 13,690 17,390 64,343 128,686 321,715 and 643,430, with no remainder.
Since 643,430 cannot be divided by just 1 and 643,430, it is not a prime number.