Farius Prime was the inhabited prime planet in its star system. It was the homeworld of the humanoid Farians.
A 2370s trade route connected Farius Prime and Galador II, which was served by Galador freighters. Deep Space 9 was a way station along this trade route. (DS9: "The Maquis, Part I")
The planet was politically neutral and hosted a Klingon embassy. The Klingon ambassador in 2374 was an opponent of Gowron and his posting there was considered a form of punishment.
Paper currency was in use on the planet, races were held and prostitution existed. A location on Farius Prime was the Jinami Street. The planet maintained both a police force and a Municipal Sanitation department.
Different species lived on the planet besides the native Farians, including Humans, Bolians, Dopterians, Nasari, and several other humanoid species.
Farius Prime was also a major hub for activities of the Orion Syndicate, a criminal organization. In 2374, Miles O'Brien was sent undercover by Starfleet Intelligence to the planet to infiltrate the organization and build a case against some of its members. Among the Farius Prime-base members of the Syndicate were Liam Bilby, Graife, Flith, Krole, Yint and Raimus. (DS9: "Honor Among Thieves")
According to StarTrek.com and the scripts for "The Maquis, Part I" and "Honor Among Thieves", the pronunciation for Farius was "FAIR-ee-us".