Q: Is 478,431 a Prime Number?
A: No, 478,431 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 478431 can be evenly divided by 1 3 9 17 51 53 59 153 159 177 477 531 901 1,003 2,703 3,009 3,127 8,109 9,027 9,381 28,143 53,159 159,477 and 478,431, with no remainder.
Since 478,431 cannot be divided by just 1 and 478,431, it is not a prime number.