why would you need to remember your own phone number. I talk to almost no one via my phone number. I can't think of a single friend I've needed to share a phone number with in ~10 years. Most of them I contact via FB Messenger, some via WhatsApp, others via Line, none of them do I call on via their phone number
Maybe phone numbers are just old crap best left in the past
Yes, I get we still use them for registering accounts but they suck IMO and need to be phased out. People move countries, numbers change or get stolen or get revoked.