#include <bits/stdc++.h>
typedef long long ll;
using namespace std;

const int INF = 1e9;
const int MOD = 1e9+7;
const ll LINF = 1e18;

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) for(int i=0;i<(n);++i)
#define REPR(i,n) for(int i=n;i>=0;i--)
#define ALL(v) (v.begin(),v.end())
#define COUT(x) cout<<(x)<<'\n'

template<class T> inline bool chmin(T& a, T b) {
    if (a > b) {
        a = b;
        return true;
    }
    return false;
}
template<class T> inline bool chmax(T& a, T b) {
    if (a < b) {
        a = b;
        return true;
    }
    return false;
}

bool prime(ll n){
  ll n_root = sqrt(n);
  if(n==1)return false;
  else if(n==2)return true;
  else if (n%2==0)return false;
  for(int i=3;i<n_root+1;i+=2){
    if(n%i==0)return false;
  }
  return true;
}

int main(){
    ll n;
    cin >> n;
    bool flag = false;
    for(int i=2;i<sqrt(n)+1;i++){
        if(n%i==0){
            if(prime(i))continue;
            else flag = true;
        }
    }
    if(flag)COUT("YES");
    else COUT("NO");
    return 0;
}