Home > 84 (number)

1 In mathematics

Eighty-four is the sum of the first seven triangular numbers (making it a tetrahedral number), as well as the sum of a twin prime (41 + 43).

2 In other fields

Eighty-four is also:

• the atomic number of polonium (Po)
• the model number of AGM-84 HarpoonThe AGM-84 Harpoon is a US all-weather, over-the-horizon, anti-ship missile system. Harpoon uses active radar guidance and low-level, sea-skimming cruise trajectory to improve survivability and effectiveness. The missile is capable of being launched from
• WGS 84
• the house number of 84 Avenue FochThe Avenue Foch is a wide residential boulevard in the 16e arrondissement of Paris, France, connecting the Arc de Triomphe and the Porte Dauphine. During the German occupation of northern France in the Second World War, the buildings at numbers 82, 84 and
• the number of the French department VaucluseDepartement de Vaucluse Details Information Number84 Region Provence-Alpes-Cote d'Azur Prefecture Avignon Subprefecture Apt Carpentras Population Total 1999 Density Ranked 50th 499,685 140 /km² Area3,567 km² Arrondissements 3 Cantons 24 Communes 151 Presi
• the designation of Interstate 84Interstate 84 is the designation of two interstate highways in the United States. The Western Interstate 84 The western Interstate 84 runs from an intersection with Interstate 5 at Portland, Oregon to an intersection with Interstate 80 at Echo, Utah—rough, a freeway that runs from OregonOregon is a state located in the western United States bordering the Pacific Ocean, California, Washington, Idaho, and Nevada. Its northern border lies along the Columbia River and the east along the Snake River. Two north-south mountain ranges the Coasta to UtahUtah ( In Detail) (Full size) State nickname: Beehive State Other U. States Capital Salt Lake City Largest City Salt Lake City Governor Olene Walker Area Total Land Water % water Ranked 13th 220,080 km² 212,988 km² 7,092 km² 3. 2% Population Total ( 2000) and from Pennsylvania to Massachusetts.
• the code for international direct dial phone calls to Vietnam
• a town in Pennsylvania: Eighty Four
• The year AD 83, 83 BC, or 1983.
• The number of earth-years it takes the planet Uranus to make one complete revolution around the Sun.
• The ISBN Group Identifier for books published in Spain