Mohammed was a prophet of islam 700 years later but the fore runner of islam was alive and well at BCE.
http://wiki.answers.com/Q/When_was_Islam_founded
“Islam religion per God revelation of Quran to prophet Muhammad was founded by the start of Quran revelation by God to prophet Muhammad through the Angel Gabriel (Jibril) in Mecca (currently in the Kingdom of Saudi Arabia) in year 610 AD.”