89 (number)
89 (eighty-nine) is the natural number following 88 and preceding 90.
In mathematics
89 is:
* the 24th prime number, following 83 and preceding 97.
* a Chen prime.
* a Pythagorean prime.
* the smallest Sophie Germain prime to start a Cunnin ...
* Atomic number 89:
actinium
Actinium is a chemical element with the symbol Ac and atomic number 89. It was first isolated by Friedrich Oskar Giesel in 1902, who gave it the name ''emanium''; the element got its name by being wrongly identified with a substance An ...
Years
*
89 BC
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Year 89 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Strabo and Cato (or, less frequently, year 665 '' Ab urbe condita'') and the Fourth Year of Zhenghe. The denomination 8 ...
*
AD 89
AD 89 (LXXXIX) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Fulvus and Atratinus (or, less frequently, year 842 '' Ab urbe cond ...