Got given a number, not sure what it’s for

I’m deaf/HOH with hearing aids. I can hear but 90% of the time I have no idea what’s being said to me. Today when I was on the beach smoking after a haircut this guy came up to me and started talking. I had no idea what he was on about so I ignored him and left — he found me again later and this time I told him that I was deaf and he gave me his number on a scrap of paper and left. I can’t figure out if he’s a dealer or if he was just giving me his number