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Unique Properties of 1089

  • The following steps always yield 1089: 1) Take any three-digit integer in which the first digit is at least two more than the last, 2) Reverse the digits, and subtract the result from the original number, 3) Add to this result the number produced by reversing its digits. For example: 732 - 237 = 495, 495 + 594 = 1089
  • 1089 is the smallest number whose reverse is a non-trivial integer multiple of itself (9801 = 9*1089)

Rare Properties of 1089

Square

Common Properties of 1089

Composite
Deficient
Odd
Odious
Powerful