#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>
#include <string>
#include <cmath>

using namespace std;

vector<long long> getPrimes(long long n) {
	vector<bool> isPrime(n + 1, true);
	isPrime[0] = false;
	isPrime[1] = false;

	for (long long i = 2; i * i <= n; i++) {
		if (isPrime[i]) {
			for (long long j = 2 * i; j <= n; j += i) {
				isPrime[j] = false;
			}
		}
	}

	vector<long long> primes;
	for (long long i = 0; i <= n; i++) {
		if (isPrime[i]) {
			primes.emplace_back(i);
		}
	}

	return primes;
}

int main() {
	long long x;

	cin >> x;

	long long rt_x = sqrt(x);

	auto primes = getPrimes(rt_x);

	long long y = 1;

	int idx = 0;
	vector<long long> n_prime(primes.size(), 0);
	while (x > 1) {
// printf("%lld %d %lld\n", x, idx, primes[idx]);
		if (x < primes[idx]) {
			y *= x;
			break;
		}
		if (x % primes[idx] == 0) {
			n_prime[idx]++;
			x /= primes[idx];
		} else {
			idx++;
		}
	}

	for (int i = 0; i < n_prime.size(); i++) {
		if (n_prime[i] % 2 == 1) {
			y *= primes[i];
		}
	}

	cout << y << endl;

	return 0;
}