How do I display the sheet name in a cell?

I'm creating a timesheet. The sheets are numbered according to the week of the year (last week was 14, this week is 15, etc). I want to have the week number in the name of the sheet, and pull it into a cell automatically. Can be text or numerical, it dosen't matter, but I want to get the sheet name into a cell within that same sheet.

thanks
John