90 (ninety) is a positive integer following 89 and preceding 91. Its ordinal form is written "ninetieth" or 90th.

Properties Edit

90 is an even composite number.

It is also the number of primordial nuclides without energetically allowed baryon number-preserving decay modes.

In googology Edit

In Greek-based number-naming systems, 90 is associated with prefix "enneaconta-", and with prefix "nonaginti-" in Latin systems.

As a banknote denomination Edit

The third Burmese kyat had banknotes with this number in the denomination.