def factorize(n):
    p = 2
    while p * p <= n:
        while n % p == 0:
            yield p
            n //= p
        p += 1
    if n > 1:
        yield n


def f(n: int) -> bool:
    if n == 1: return False
    ps = list(factorize(n))
    return len(ps) > 2


N = int(input())
ans = f(N)
if ans:
    print('YES')
else:
    print('NO')