#include<bits/stdc++.h>
using lint=long long;
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    lint n;std::cin>>n;
    std::vector<lint>a;
    for(lint i=2;i*i<=n;i++){
        if(n%i!=0)continue;
        for(;n%i==0;n/=i)a.push_back(i);
    }
    if(1<n)a.push_back(n);
    std::cout<<(2u<a.size()?"YES":"NO")<<'\n';
}