Divisor 1909

To determine if any number is divisible by 1909, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 23 and 83 - then it is divisible by 1909.

The following tests must pass:

• Test if a number is divisible by 23
• Test if a number is divisible by 83

Easy!