Russia, also officially known as the Russian Federation, is a state in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects. Russia shares borders with the following countries (from northwest to southeast): Norway, Finland, Estonia, Latvia, Lithuania and Poland (both via Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, the People's Republic of China, Mongolia, and North Korea. It also has maritime borders with Japan and the United States. At 17,075,400 square kilometres, Russia is by far the largest country in the world, covering more than a ninth of the Earth's land area. Russia is also the ninth most populous nation in the world with 142 million people. It extends across the whole of northern Asia and 40% of Europe, spanning 9 time zones and incorporating a wide range of environments and landforms. Russia has the world's largest reserves of mineral and energy resources, and is the world's largest energy superpower. It has the world's largest forest reserves and its lakes contain approximately one-quarter of the world's fresh water. Russia is a permanent member of the United Nations Security Council, a member of the G8, G20, the Council of Europe, the Asia-Pacific Economic Cooperation, the Shanghai Cooperation Organization, the Eurasian Economic Community, the OSCE, and is the leading member of the Commonwealth of Independent States.