#include <vector> 
#include <list> 
 #include <map>
 #include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <queue>
using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) {int v; istringstream sin(s);sin>>v;return v;}
template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();}

//math
//-------------------------------------------
template<class T> inline T sqr(T x) {return x*x;}

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef long long LL;

//container util
//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)  FOR(i,0,n)

//constant
//--------------------------------------------
const double EPS = 1e-10;
const double PI  = acos(-1.0);

//clear memory
#define CLR(a) memset((a), 0 ,sizeof(a))

//debug
#define dump(x)  cerr << #x << '=' << (x) << endl;
#define debug(x) cerr << #x << '=' << (x) << '('<<'L' << __LINE__ << ')' << ' ' << __FILE__ << endl;


const int MAX_N=12345678;
bool prime[MAX_N+1];

//エラトステネスのふるい
int sieve(LL n){
    REP(i,MAX_N){prime[i]=true;}
    prime[0]=prime[1]=false;
    for(int i=2;i<=n;i++){
        if(prime[i]){
            for(int j=2*i;j<=n;j+=i){
                prime[j]=false;
            }
        }
    }
}
bool is_ok(LL n){
    int num=0;
    for(LL i=2;i*i<n;i++){
        if(n%i==0){
            num++;
            if(num>3){return false;}
        }
    }
    num+=(n!=1);
    return num<3;
}

int main(){
    LL a;
    
    cin>>a;
    if(is_ok(a)){
        cout<<"NO"<<endl; return 0;
    }
    else{
        cout<<"YES"<<endl; return 0;
    }


}