According to the bible - 1. Three in number (the number isn't mentioned at all).
2. Kings (they were “wise” men) – this probably comes from Psalm
71:11 (72:11 in protestant bibles): “And all kings of the earth
shall adore him: all nations shall serve him.”
3. Traveling on camels. Matthew 2:1–2 says: “When Jesus therefore
was born in Bethlehem of Judah, in the days of King Herod, behold,
there came wise men from the east to Jerusalem.” It says a little
later that they offered Him gifts of “gold, frankincense, and myrrh”
– but that is about as specific as it gets. Now we are all wiser
for knowing this.