require 'prime'

n = gets.strip.to_i
div = n.prime_division
len = div.length
if len > 2
	puts "YES\n"
elsif len == 1 && div[0][1] == 2
	puts "NO\n"
elsif len == 0
	puts "NO\n"
else
	div.each do |primes|
		if primes[1] > 1
			puts "YES\n"
			exit
		end
	end
	puts "NO\n"
end