Sudan is a country in eastern North Africa (considered to be part of the Middle East, as well). It is bordered by Egypt to the north, the Red Sea to the northeast, Eritrea and Ethiopia to the east, South Sudan to the south, the Central African Republic to the southwest, Chad to the west, and Libya to the northwest. The population of Sudan is a combination of indigenous Nilo-Saharan-speaking Africans, and descendants of migrants from the Arabian Peninsula. The majority of the population of Sudan adheres to Islam. Khartoum is the political, cultural and commercial centre of the nation. The Blue and White Nile rivers meet in Khartoum to form the River Nile, which divides the country between east and west sides and flows northwards through Egypt to the Mediterranean Sea. The people of Sudan have a long history extending from antiquity which is intertwined with the history of Egypt.