89

89 (eighty-nine) is a positive integer following 88 and preceding 90. Its ordinal form is written "eighty-ninth" or 89th.
== Properties ==
* 89 is an .
* 89 is the 10th Mersenne exponent.MathWorld, Mersenne Prime
== In googology ==
In Greek-based number-naming systems, 89 is associated with prefix "enneaoctaconta-", and with prefix "novemoctoginti-" in Latin systems.
== Sources ==
Category:Numbers
Category:Class 1
Category:Numbers 0-99
Category:Prime numbers
Category:Fibonacci numbers
Category:Numbers with 1 to 2 digits