Original: Nicomachus writes extensively on numbers, especially on the significance of prime numbers and perfect numbers and argues that arithmetic is ontologically prior to the other mathematical sciences (geometry, music, and astronomy), and is their cause.
Simplified: In Introduction to Arithmetic, Nicomachus writes extensively on number, especially on the significance of prime numbers and perfect numbers and argues that arithmetic is ontologically prior to the other mathematical sciences (geometry, music, and astronomy), and is their cause.