Divisor 1989
- Prime Number:
- No
Test for Divisibility by 1989
To determine if any number is divisible by 1989, you must apply 3 tests successively. If all of them 'pass' - that is, if your number is divisible by 9 and 13 and 17 - then it is divisible by 1989.
The following tests must pass:
- Test if a number is divisible by 9
- Test if a number is divisible by 13
- Test if a number is divisible by 17
Easy!