Q: Is 243,664 a Prime Number?
A: No, 243,664 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 243664 can be evenly divided by 1 2 4 8 16 97 157 194 314 388 628 776 1,256 1,552 2,512 15,229 30,458 60,916 121,832 and 243,664, with no remainder.
Since 243,664 cannot be divided by just 1 and 243,664, it is not a prime number.