A lucky number, no. Favorite number, yes! That would be 17. I am usually drawn to prime numbers any way, but 17 just seems to have such a ring to it. I thought I would get over my love for the number 17 after I passed that age, but 8 years later I still dig it. (which is interesting that 8 years later this question and answer should have occurred. In numerology, 17 reduces to 8 (1+7=8). 8 in numerology represents a balancer, that which brings balance to life, as well as success. I started studying numerology way after 17 and I bonded)
I like the number 4, but I don't feel that it's particularly lucky or anything. It just appeals to me aesthetically. If you read old fairy tales and legends, the stories tend to feature prime numbers (3, 5, 7, 11, 13, etc.) or highly composite numbers (12, 60, etc.). as lucky or unlucky numbers.