No, there are not any prerequisite courses. At a minimum, you need to have a bachelor’s degree from an accredited school or university. In addition, ideal candidates will have a strong quantitative aptitude.
If your undergraduate degree is not in a quantitative subject, or if you did not take or do well in many quantitative courses, we recommend taking a math course (e.g., algebra or calculus) or the GRE. If you don’t have experience with online learning, we recommend taking one of our introductory CS courses.