309

309 ("three hundred and nine" in words) is a positive integer following 308 and preceding 310.
== Properties ==
* 309 is a .
* 309 is an .
* 309's prime factorization is 3 * 103.
== In history ==
* Alexander IV (323–309 BC), erroneously called sometimes in modern times Aegus was the son of Alexander the Great (Alexander III of Macedon) and Princess Roxana of Bactria.
== Sources ==
Category:Numbers
Category:Class 1
Category:Unnamed numbers with 3 digits
Category:Numbers with 3 digits