import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        long n = sc.nextLong();
        HashMap<Long, Integer> counts = new HashMap<>();
        for (long i = 2; i <= Math.sqrt(n); i++) {
            while (n % i == 0) {
                counts.put(i, counts.getOrDefault(i, 0) + 1);
                n /= i;
            }
        }
        for (long x : counts.keySet()) {
            if (counts.get(x) % 2 == 1) {
                n *= x;
            }
        }
        System.out.println(n);
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}