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Russia or the Russian Federation is a transcontinental country. It is a semi-presidential republic comprising 83 federal subjects. Russia shares land borders with the following countries: Norway, Finland, Estonia, Latvia, Lithuania (via Kaliningrad Oblast), Poland (via Kaliningrad Oblast), Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, China, Mongolia and Democratic People's Republic of Korea. At more than 17 million square kilometres, Russia is the largest country in the world, covering more than an eighth of the Earth’s land area; with 142 million people, it is the ninth largest by population. Russia has the world's greatest reserves of mineral and energy resources, and is considered an energy superpower. It has the world's largest forest reserves and its lakes contain approximately one-quarter of the world's unfrozen fresh water.