Q: Is 209,408 a Prime Number?
A: No, 209,408 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 209408 can be evenly divided by 1 2 4 8 16 32 64 128 256 409 512 818 1,636 3,272 6,544 13,088 26,176 52,352 104,704 and 209,408, with no remainder.
Since 209,408 cannot be divided by just 1 and 209,408, it is not a prime number.