Divisor 13973

To determine if any number is divisible by 13973, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 89 and 157 - then it is divisible by 13973.

The following tests must pass:

• Test if a number is divisible by 89
• Test if a number is divisible by 157

Easy!