def solve(X):
    fact = []
    i = 2
    while i * i <= X:
        cnt = 0
        while X % i == 0:
            cnt += 1
            X /= i
        if cnt > 0:
            fact.append((i, cnt))
        i += 1
    if X > 1:
        fact.append((X, 1))
    res = 1
    for a, p in fact:
        res *= a ** (p % 2)
    return res

X = int(raw_input())
print solve(X)