SQL: MD5() vs hex()

SQLite doesn't have MD5 built in, so I'm considering using the hash function instead. I don't know much about hashing, but I can see that hash() output is numerical and of varying length while MD5() returns mixed characteds/numbers of a fixed length.

I couldn't find anything on this on stackoverflow or google.

Can hash() with salt be used to safely store passwords?

EDIT: Super embarassing mistake, I actually ment hex(), not hash() - Sorry for the error