Divisor 17647

To determine if any number is divisible by 17647, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 7 and 2521 - then it is divisible by 17647.

The following tests must pass:

• Test if a number is divisible by 7
• The "Ken Test" for Divisibility by 2521

Easy!