Q: Is 999,999 a Composite Number?

Why is 999,999 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 999,999 can be evenly divided by 1 3 7 9 11 13 21 27 33 37 39 63 77 91 99 111 117 143 189 231 259 273 297 333 351 407 429 481 693 777 819 999 1,001 1,221 1,287 1,443 2,079 2,331 2,457 2,849 3,003 3,367 3,663 3,861 4,329 5,291 6,993 8,547 9,009 10,101 10,989 12,987 15,873 25,641 27,027 30,303 37,037 47,619 76,923 90,909 111,111 142,857 333,333 and 999,999, with no remainder.

Since 999,999 cannot be divided by just 1 and 999,999, it is a composite number.

More Examples

• All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).