Jacob Blessed Pharaoh

Jacob....blessed....Pharaoh. His sons had bowed before Pharaoh and three times called themselves “your servants.”

But Jacob does not bow. Jacob does not refer to himself as Pharaoh's servant.

Jacob's sons did not speak until Pharaoh had spoken to them. But Jacob walks into the throne room of the most powerful man on earth, and claims to be his superior by blessing him!

What does it mean that Jacob blessed Pharaoh?