Atum, also known as Tem or Tum, is a god from ancient Egyptian mythology who is often depicted as a man with a head of a lion or a serpent, symbolizing his association with the sun and creation. He is the god of creation, the sun, and the first god, and is often associated with the protection of the pharaohs and the people.

Atum was considered the god of creation, the sun, and the first god, and was often depicted as the creator of the world and the first being to come into existence. He was believed to the single parent of the first gods and goddesses were born. He was also associated with the setting and rising of the sun, and was considered to be the source of life and vitality.

Atum was also known as the father of Shu and Tefnut, the god and goddess of air and moisture, respectively, and together they formed the first divine couple of the Ennead (a group of nine deities in ancient Egyptian religion). He was also considered the father of the pharaohs, as the pharaohs were believed to be the physical embodiment of the god Horus, who was the son of Osiris and Isis.

One of the most interesting facts about Atum is that he was also associated with the city of Heliopolis, where he was considered the patron god of the city. The temple of Atum in Heliopolis was one of the most important religious centers in ancient Egypt, and it was believed to be the place where Atum first emerged from the primordial waters to create the world.