She is not identified in scripture as having been a prostitute, by the way. She is mentioned in Luke 8:2 as having seven demons delivered from her body, a reference that grew into the common misconception in Western Christianity that she was not only the "first witness", but a practitioner of the "first profession."
For those willing to commit to some minor research, look up the Eastern Christian story of Mary and the red egg.
Almighty God, whose blessed Son restored Mary Magdalene to health of body and mind, and called her to be a witness of his resurrection: Mercifully grant that by your grace we may be healed of all our infirmities and know you in the power of his endless life; who lives and reigns with you and the Holy Spirit, one God, now and for ever.