Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

Can I prove having savings without giving out the account number?
Giving out your bank account number is not generally a security problem.  The first time you write your landlord a security deposit or rent check, he'll have your account number.  (It's printed on the check.) That having been said, in my experience, banks do not generally give out balance information to just anyone who calls them up and gives them an account number.  Have you asked the landlord what he needs?  Perhaps showing him a printout of a recent bank statement is enough.