package main

import (
	"bufio"
	"bytes"
	"fmt"
	"os"
	"os/exec"
	"strconv"
	"strings"
)

var sc = bufio.NewScanner(os.Stdin)
var rdr = bufio.NewReaderSize(os.Stdin, 1000000)

func main() {
	sc.Split(bufio.ScanWords)
	n := nextInt64()
	if n == 1 {
		fmt.Println(1)
		return
	}

	cmd := exec.Command("factor", fmt.Sprintf("%d", n))
	var stdout bytes.Buffer
	cmd.Stdout = &stdout
	cmd.Run()

	s := strings.Split(stdout.String(), ":")
	s = strings.Split(strings.TrimSpace(s[1]), " ")
	m := make(map[int]int)
	for _, v := range s {
		i, _ := strconv.Atoi(v)
		m[i]++
	}

	total := 1
	for k, v := range m {
		if v%2 == 1 {
			total *= k
		}
	}
	fmt.Println(total)
}

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}

func nextInt64() int64 {
	i, _ := strconv.ParseInt(nextLine(), 10, 64)
	return i
}

func nextUint64() uint64 {
	i, _ := strconv.ParseUint(nextLine(), 10, 64)
	return i
}

func nextFloat() float64 {
	f, _ := strconv.ParseFloat(nextLine(), 64)
	return f
}

func readLine() string {
	buf := make([]byte, 0, 1000000)
	for {
		l, p, e := rdr.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}