#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

#include <algorithm>
#include <bitset>
#include <climits>
#include <cmath>
#include <cstring>
#include <deque>
#include <forward_list>
#include <functional>
#include <iomanip>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

using namespace std;
typedef long long ll;
typedef pair<int, int> P;
typedef bitset<16> BS;
struct edge {
    int to, cost, id;
};
const double EPS = 1E-09;
const ll MOD = 1E+09 + 7; // =998244353;
const ll INF = 1E18;
const int MAX_N = 1E+05;

ll dx[4] = { -1, 1, 0, 0 }, dy[4] = { 0, 0, -1, 1 };

ll N;

map<ll, ll> prime_factor(ll n);

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    cin >> N;

    auto res = prime_factor(N);

    bool ans = true;
    if (res.size() == 2) {
        ans = !all_of(res.begin(), res.end(), [](pair<ll, ll> p) { return p.second == 1; });
    } else if (res.size() == 1) {
        if (res.begin()->second <= 2)
            ans = false;
    } else if (res.size() == 0) {
        ans = false;
    }

    /*
    for (int i = 0; i < N; i++) {
        for (int j = 0; j < N; j++) {
            cout << "i = " << i << ", j = " << j << ", dp = " << dp[i][j] << "\n";
        }
    }
    */

    cout << (ans ? "YES" : "NO") << "\n";

    return 0;
}

//素因数分解
map<ll, ll> prime_factor(ll n)
{
    map<ll, ll> mp;
    for (ll i = 2; i * i <= n; i++) {
        while (n % i == 0) {
            mp[i]++;
            n /= i;
        }
    }
    if (n != 1)
        mp[n] = 1;
    return mp;
}