Hi Halfswede,
I used to have similar feelings about numbers as a child. To me, even numbers were evil (2 - therefore 4 and 8 were worse) and odd numbers were beautiful - 3 as a basic no. therefore 9 was a "holy" number for me too! I'm not sure why I felt this holy aspect considering I wasn't raised in a religious household. It was just a feeling. I also used to think left was good and right was bad, so I would always tie my laces on the left shoe first I'm not sure why I had this, and it only stayed with me for a few years.

If it's causing you anxiety or concern though, maybe you could consult a psychologist and explore it