#define _USE_MATH_DEFINES

#include <iostream>
#include <iomanip>

#include <algorithm>
#include <cmath>

#include <string>
#include <list>
#include <queue>
#include <vector>
#include <complex>
#include <set>

/////////
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define P(p) cout<<(p)<<endl;
/////////
typedef long long LL;
typedef long double LD;
/////////
using namespace::std;
/////////

bool primeNum(LL num){
	if(num==2 || num==3){
		return true;
	}
	for(int i=2;i<sqrt(num*1.0)+1;++i){
		if(num%i == 0){
			return false;
		}
	}
	return true;
}
int main(void){
    std::cin.tie(0); 
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed;//
    //cout << setprecision(6);//
	
	LL N;
	cin>>N;

	if(N==1){
		P("NO");
	}
	else if(primeNum(N)==true){
		P("NO");
	}else{
		P("YES");
	}
	return 0;
}