def find_min_y(X):
    Y = 1
    # 处理2的因数
    if X % 2 == 0:
        count = 0
        while X % 2 == 0:
            X = X // 2
            count += 1
        if count % 2 != 0:
            Y *= 2
    
    # 处理奇数因数
    p = 3
    while p * p <= X:
        if X % p == 0:
            count = 0
            while X % p == 0:
                X = X // p
                count += 1
            if count % 2 != 0:
                Y *= p
        p += 2
    
    # 处理剩余的大于1的质因数
    if X > 1:
        Y *= X
    
    return Y

X = int(input())
print(find_min_y(X))