def prime_decomposition(N):
    M = N
    i = 2
    table =[]
    while i * i <= N:
        while M % i == 0:
            M /= i
            table.append(int(i))
        i += 1
    if M > 1:
        table.append(int(M))
    return table


def not_prime_table(N):
    table = []
    i = 3
    while i * i <= N:
        if not is_prime_number(i):
            table.append(i)
        i += 2
    return table


def is_prime_number(N):
    if N in [1, 2]:
        return True
    elif N == 0:
        return False
    else:
        i = 3
        while i * i <= N:
            if N % i == 0:
                return False
        return True


if __name__ == '__main__':
    N = int(input())
    li = prime_decomposition(N)
    if len(li) <= 2:
        print('NO')
    else:
        print('YES')