French Guiana, officially called simply Guiana (French: Guyane), is an overseas department and region of France, on the north Atlantic coast of South America. It borders Brazil to the east and south, and Suriname to the west. Its 83,534 km2 (32,253 sq mi) area has a very low population density of only 3 inhabitants per km2, with half of its 250,109 inhabitants in 2013 living in the metropolitan area of Cayenne, its capital. By land area, it is by far the largest Overseas departments of France. As an overseas region, it is inside the European Union, and its official currency is the euro.