Divisor 7209

To determine if any number is divisible by 7209, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 81 and 89 - then it is divisible by 7209.

The following tests must pass:

• Test if a number is divisible by 81
• Test if a number is divisible by 89

Easy!