#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;
/////////

LL prime(LL num){
	for(LL i=2;i*i<=num;++i){
		if(num%i == 0){
			return num/i;
		}
	}
	return 0;
}
int main(void){
    std::cin.tie(0); 
    std::ios::sync_with_stdio(false);
    std::cout << std::fixed;//
    //cout << setprecision(6);//
	
	LL N;
	cin>>N;
	//素数以外で割り切れる数
	//1とN以外で割り切れる数
	
	LL fact = N;
	LL temp;
	int ans=0;
	do
	{
		temp =  prime(fact);
		if(temp == 0){
			++ans;
			break;
		}else{
			fact = temp;
			++ans;
		}
	}while(ans<3);

	if(ans < 3){
		P("NO");
	}else{
		P("YES");
	}
	
	return 0;
}