'Seventeen' in the Bible

These are the generations of Jacob.Joseph, when he was seventeen years old, was shepherding the flock with his brothers [Dan, Naphtali, Gad, and Asher]; the boy was with the sons of Bilhah and Zilpah, his father’s [secondary] wives; and Joseph brought back a bad report about them to their father.

And Jacob lived in the land of Egypt seventeen years; so the length of Jacob’s life was a hundred and forty-seven years.