#![allow(non_snake_case)]

use std::collections::{ HashMap };
use std::io::{ self, prelude::* };

macro_rules! pick {
    ($tokens:expr) => {
        $tokens.next().unwrap().parse().expect("parse error")
    }
}

fn f(n: i64) -> HashMap<i64,i64> {
    let mut res = HashMap::new();

    let mut x = n;
    for i in (2..).take_while(|i| i*i <= n) {
        while x % i == 0 {
            *res.entry(i).or_insert(0) += 1;
            x /= i;
        }
    }
    res.insert(x, 1);

    res
}

fn main() {
    let mut s = String::new();
    io::stdin().read_to_string(&mut s).expect("i/o error");
    let mut tokens = s.split_whitespace();

    let X: i64 = pick!(tokens);

    let m = f(X);

    let mut ans = 1;
    for (k,v) in m.into_iter() {
        if v % 2 != 0 {
            ans *= k;
        }
    }

    println!("{}", ans);
}