The natural numbers along with zero is called set of____

Are all natural numbers whole numbers?

Set of natural numbers is denoted by-

Taking the set of natural numbers as the universal set, write down the complements of the following sets: { x : x is a prime number }

Taking the set of natural numbers as the universal set, write down the complements of the following sets: { x : x is a positive multiple of 3}

Taking the set of natural numbers as the universal set, write down the complements of the following sets: { x : x is a perfect square }

Taking the set of natural numbers as the universal set, write down the complements of the following sets: { x : x is a perfect cube}