Is 9261 A Prime Number? Prime Factors Of 9261; Is 9261 A Composite Number? Is 9261 An Even Number? Is 9261 An Odd Number? Square Root Of 9261? About Number 9. Nine is the smallest odd composite number and the minimum composite odd number that is no Fermat pseudoprime. To find the cube root of a number, start by breaking that number into its prime factorization. Rewrite those factors using exponents and break up the radicals using the Product Property of Radicals. Simplify and you're done! Watch this tutorial to see the entire process step-by-step.