#include <bits/stdc++.h>
using namespace std;
#define int long long
#define endl "\n"
const int N = 110;

// 筛法求莫比乌斯函数
int mu[N], primes[N], cnt;
bool st[N];
void get_mobius(int n) {
    mu[1] = 1;
    for (int i = 2; i <= n; i++) {
        if (!st[i]) {
            primes[cnt++] = i;
            mu[i] = -1;
        }
        for (int j = 0; primes[j] <= n / i; j++) {
            int t = primes[j] * i;
            st[t] = true;
            if (i % primes[j] == 0) {
                mu[t] = 0;
                break;
            }
            mu[t] = -mu[i];
        }
    }
}

signed main() {
    // 筛法求莫比乌斯函数
    get_mobius(N - 1);

    int T;
    while (cin >> T) {
        int s = 1;

        for (int i = 2; i <= 64; i++) s -= mu[i] * (int)(pow(T * 1.0, 1.0 / i) - 1);
        cout << s << endl;
    }
}