def prime_factorize(N):
    ret = []
    tmp = N
    c = int(N**0.5) + 1
    for i in range(2, c):
        while tmp % i == 0:
            tmp = tmp // i
            ret.append(i)
            if len(ret) > 1 and ret[0] * ret[1] < N:
                return True
        if tmp == 1:
            break
    return False

N = int(input())
print('YES' if prime_factorize(N) else 'NO')