Bots
Official telegram.org Source
Yes. Bots are no different from human users that you meet in groups for example. They can see your public name, username, and profile pictures, and they can see messages you send to them, that's it. They can't access your last seen status anddon'tsee your phone number (unless you decide to give it to them yourself).
Naturally, any bot should be treated as a stranger — don't give them your passwords, Telegram codes or bank account numbers, even if they ask nicely. Also, be careful when opening files sent by bots, same as you would deal with ordinary humans. Example: If a bot sent us a file calledOpenMe.exe, we probably wouldn't open it.
Official Telegram Reference: https://telegram.org/faq
Part of the TGWAY.com Official Telegram Knowledge Base (98 Verified Q&As).