Q: Is 1,393,664 a Prime Number?
A: No, 1,393,664 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 1393664 can be evenly divided by 1 2 4 8 16 32 64 128 256 512 1,024 1,361 2,722 5,444 10,888 21,776 43,552 87,104 174,208 348,416 696,832 and 1,393,664, with no remainder.
Since 1,393,664 cannot be divided by just 1 and 1,393,664, it is not a prime number.