Russia, or the Russian Federation, is a country extending over much of northern Eurasia (Europe and Asia together). It is a semi-presidential republic comprising 83 federal subjects. Russia shares land borders with the following countries (counterclockwise from northwest to southeast): Norway, Finland, Estonia, Latvia, Lithuania (via Kaliningrad Oblast), Poland (via Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia and the Democratic People's Republic of Korea. At 17,075,400 square kilometres (6,592,800 sq mi). It extends across the whole of northern Asia and 40% of Europe, spanning 11 time zones and incorporating a great range of environments and landforms. Russia has the world's greatest reserves of mineral and energy resources, and is considered an energy superpower.