'Seventeen' in the Bible

These are births of Jacob: Joseph, a son of seventeen years, hath been enjoying himself with his brethren among the flock, (and he is a youth,) with the sons of Bilhah, and with the sons of Zilpah, his father's wives, and Joseph bringeth in an account of their evil unto their father.

and Jacob liveth in the land of Egypt seventeen years, and the days of Jacob, the years of his life, are an hundred and forty and seven years.