Simcha...that is good news, and amazing that you found him after so many days missing.
My "old kitty" has also been gone for at least that amount of time. I called the animal shelter to see if they had an old yellow/white cat, but not. He was inside/outside and just didn't come home one day. He is a neutered male, but he has done this before, then showing up after a long time. I hope to find him, or that he returns.
Glad your kitty is okay.
Love
Patty