And to counter any false claims that Muhammad never made a true prophecy I would offer this" Once upon a time Muhammad was the only Muslim in the world. He predicted that there would be a time when Islam would spread across the earth and be the dominant religion of humanity. Quite a boast coming from a single human being without any political or military power living out in the middle of some forsaken desert.
There are now over 2 billion Muslims on the Earth, behind only the religion of Christianity, which had a 700 year head start.
In this year of 2019, 1400 years after his death, you may take Muhammad's bold statement as a false prophecy, but, based on current birth rates and global trends, I would urge you to perhaps wait 700 years (or even 100) to possibly re-evaluate that conclusion.