#include <bits/stdc++.h>
using namespace std;
#define F0(i,n) for (int i=0; i<n; i++)
#define F1(i,n) for (int i=1; i<=n; i++)
#define CL(a,x) memset(x, a, sizeof(x));
#define SZ(x) ((int)x.size())
const int inf = 1000009;
const double pi = acos(-1.0);
typedef pair<int, int> pii;
typedef long long ll;
const double EPS = 1e-9;
const int MOD = 998244353;
#define PR(x) cerr << #x << "=" << x << endl
template<class A, class B>
ostream& operator<<(ostream& os, const pair<A, B>& p) { os << "(" << p.first << ", " << p.second << ")"; return os; }
template<class A, class B, class C>
ostream& operator<<(ostream& os, const tuple<A, B, C>& p) { os << "(" << get<0>(p) << ", " << get<1>(p) << ", " << get<2>(p) << ")"; return os; }
istream& operator>>(istream& is, pii& p) { is>>p.first>>p.second; return is; }
template<class T>
ostream& operator<<(ostream& os, const vector<T>& v) { os << "["; F0(i,SZ(v)) { if (i>0) os << ","; os << v[i]; } os << "]"; return os; }
template<class T>
ostream& operator<<(ostream& os, const set<T>& v) { os << "{"; int f=1; for(auto i:v) { if(f)f=0;else os << ","; cerr << i; } os << "}" << endl; return os; }
template<class T, class R>
ostream& operator<<(ostream& os, const map<T,R>& v) { os << "{"; int f=1; for(auto i:v) { if(f)f=0;else os << ", "; cerr << i.first << ":" << i.second; } os << "}" << endl; return os; }

int i, j, k;
ll n, m, ans;
const int N = 200005;
const int M = 435;
int dp[N];

const int DX[]={-1,0,1,0};
const int DY[]={0,1,0,-1};
const string CS="nesw";
const string HS="URDL";

void Add(int& x, int y) {
    x += y;
    if (x >= MOD) x -= MOD;
}


ll Mult(int x, int y) {
    return 1LL * x * y % MOD;
}


ll modpow(ll x, ll n) {
    if (n == 0) return 1;
    ll y = modpow(x, n / 2); y = (y * y) % MOD;
    if (n & 1) y = (y * x) % MOD;
    return y;
}

const int MAXN = 200001;
ll f[MAXN], rf[MAXN];

ll C(int n, int k) {
    return f[n] * rf[k] % MOD * rf[n - k] % MOD;
}

void Solve() {
    int cnt = 0;
    for (int i = 2; i <= 1000000; i++) if (n % i == 0) {
        while (n % i == 0) n /= i;
        cnt++;
    }
    if (n > 1) cnt++;
    if (cnt <= 2) cout << "Yes" << endl; else cout << "No" << endl;
}

int main() {
    //ignore = freopen("x.in", "r", stdin);
    //freopen("x.out", "w", stdout);

    //int tn; cin >> tn;
    //F1(ti, tn) {

    f[0] = rf[0] = 1;
    for (int i = 1; i <= 200000; i++) {
        f[i] = (f[i - 1] * i) % MOD;
        rf[i] = modpow(f[i], MOD - 2);
    }

    while (cin >> n) {
        //PR(n);

        Solve();
    }


    return 0;
}