def factorization(n):
    relist = []
    if n == 1:
        relist = 1
    for i in range(2, int(n ** 0.5) + 1): #割る数
        while n % i == 0:
            relist.append(i)
            n /= i
    if n != 1:
        relist.append(int(n))
    return relist    
print('Yes' if len(set(factorization(int(input())))) == 2 else 'No')