This particular scarab calls upon the protection of both Amun-Ra and the Menkheperre blessing.
The Egyptian god, Amun-Ra, was a highly important deity in the Egyptian pantheon. Originally, he was worshipped as two gods, the creator of the universe, Amun, and the sun-god, Ra. He gains national importance after the defeat of the Hyksos at Thebes in the 16th century and it is from this date we see a combination of the two gods. As his position grew, Amun-Ra’s worship was almost monotheistic in nature, with the other gods considered manifestations of him. So great was his influence that he was identified with the Greek god Zeus from the Ptolemaic period, to form Zeus Ammon. Alexander the Great claimed divine descent as the son of Amun.
Not all scarabs bearing a royal name are contemporaneous to the ruling pharaoh. Some kings were held in particularly high regard, and thus their name appears on scarabs hundreds of years after their reign. Thutmosis III of Dynasty XVIII was particularly honoured in this way, with his praenomen, Men-Kheper-Re, used on scarabs for a period of circa 1000 years.
To find out more about Ancient Egyptian amulets please see our relevant blog post: Egyptian Amulets and their Meanings.