Satan is a fallen Cherub whose name is Lucifer (Sinning One of the Dawn), Isaiah 14:12
Cherubim are higher in the creation scale than angels (messengers).
Lucifer was the pinnacle of God’s creation before his fall, Ezekiel 28:14.
Lucifer is a created being:
He is not omniscience: he does not know everything.
He is not omnipresent: he cannot be in more than one place at a time.
He has a natural musical ability, Ezekiel 28:13 the workmanship of his settings and sockets were in him when he was created. setting and sockets (or pipes and tabrets) refer to musical instruments. Why is this significant to note? No other spirit being has the ability to make music naturally. e.g. Angels do not sing, they shout. Although inherently there is no evil in music, it can be used maliciously to effect people and influence their actions.
He has the ability to appear as a message (angel) of light, 2 Corinthians 11:14.
He is a spirit being; therefore, any battle with him is fought in the rational part of the mind (human spirit), Ephesians 6:12.