Arcana Coelestia #738
738. He is called 'a son of six hundred years' here because, as shown already, 'son' means intellectual truth. He is not however referred to as a son in verse 11 below because there the subject is his temptation as regards things of the will.
Arcana Coelestia #6174
6174. 'Seventeen years' means the state there. This is clear from the meaning of 'seventeen' as from beginning to end, or from the beginning to something new, dealt with in 755, 4670 (end); and from the meaning of 'years' as states, dealt with in 487, 488, 493, 893, so that here 'seventeen years in which Jacob lived in Egypt' means the beginning of the state of spiritual life in the natural among known facts even to the end of that state. For all numbers in the Word serve to denote spiritual realities, see 575, 647, 648, 755, 817, 1963, 1988, 2075, 2252, 3252, 4264, 4495, 4670, 5265.