#include <algorithm>
#include <cstdio>
#include <iostream>
#include <map>
#include <cmath>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include <bitset>
using namespace std;

#define PI         acos(-1.0)
#define FOR(I,A,B) for(long long I = (A); I < (B); ++I)

typedef long long ll;

map<ll, bool> MAP;
bool used[10000010];

void prime(){
    FOR(i,2,10000010){
        if(used[i]) continue;
        MAP[i] = true;
        ll j = i;
        while(j<10000010){
            used[j] = true;
            j += i;
        }
    }
}

int main(){
    FOR(i,0,10000010) used[i] = false;
    prime();
    ll n;
    cin >> n;
    bool ok = false;
    FOR(i,2,(ll)sqrt(n)+1){
        if(n % i == 0 && MAP.count(i) == 0) ok = true;
        if(n % i == 0) if(n % n/i == 0 && MAP.count(n/i) == 0) ok = true;
    }
    cout << (ok ? "YES" : "NO") << endl;
    return 0;
}