#include <iostream>
#include <vector>
#include <map>
#include <cmath>
using i64 = long long;

int main()
{

    i64 n = 0;
    std::cin >> n;
    bool flag = false;
    const i64 max = 100000000000000;

    const i64 goal = i64(std::sqrt(n) + 1);
    int counter = 0;
    for( i64 i = 2; i <= goal; ++i){
        if(n%i==0)
        {
            ++counter;
            if(counter>=2)
            {
                flag = true;
                break;
            }
            n /= i;
            i = 2;
        }
    }


    if(flag==false)
        std::cout << "NO" << std::endl;
    else
        std::cout << "YES" << std::endl;

    return 0;
}