is it possible to get and use page numbers in formulars in Mathcad Prime?
Follow the indications in the picture:
You can not do anything else with the page numbers, in fact ... just make it appear in the page.
I think you're asking if you can use the page number in an equation. This is not possible.
It might have been possible (though, I'm doubtful) in Mathcad 15 using scripted components.