Assuming that you are asking about the third party MathType extension, and not the Math application integrated in the Office suite.Mathtype works with all relevant OpenOffice/LibreOffice applications (i.e. Math and Base are excluded) on MS Windows and Apple OSX, and should generate a fallback graphic for displaying content on unsupported platforms (e.g. iOS, Linux, Android).
- What is your device? (A Mac/PPC, tablet, Chromebook, etc.?)
- Which "Word format" did you use? (Talking about a specific file/storage format, or a specific viewer app?)
- What do you mean by "only empty and equation numbers"? (Is it the sequence numbers like "Equation 1, Equation 2" etc. or content - i.e. numbers inside equations?)
Depending on the nature and context of your problem, it may be more pertinent to ask
Design Science for a solution.