Divisor 13389

To determine if any number is divisible by 13389, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 3 and 4463 - then it is divisible by 13389.

The following tests must pass:

• Test if a number is divisible by 3
• The "Alex Durrant Test" for Divisibility by 4463

Easy!