The rpm numbers that're published with engines are just numbers. Ignore them.

The recommended propellers, on the other hand, are worth considering. It's the appropriate prop you want to find, not a magic rpm. And there will be a number of candidates that might work for your engine on whatever it's bolted to.

You don't mention what airplane. That'd be important to know in order to suggest a prop. That is what this is all about, isn't it?