Officially People's Democratic Republic of Algeria, is asovereign state in North Africa on the Mediterranean coast. Its capital and most populous city is Algiers, located in the country's far north. With an area of 2,381,741 square kilometres (919,595 sq mi), Algeria is the tenth-largest country in the world, and the largest in Africa and the Arab world. Algeria is bordered to the northeast by Tunisia, to the east by Libya, to the west by Morocco, to the southwest by Western Sahara, Mauritania, and Mali, to the southeast by Niger, and to the north by the Mediterranean Sea. The country is a semi-presidential republic consisting of 48 provinces and 1,541 communes. Abdelaziz Bouteflika has been President since 1999.