Divisor 13383

To determine if any number is divisible by 13383, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 1487 - then it is divisible by 13383.

The following tests must pass:

• Test if a number is divisible by 9
• The "Kathryn Castellana Test" for Divisibility by 1487

Easy!