def sosuiya(N):
    result = []
    i = 2
    while N != 1:
        if N % i == 0:
            result.append(i)
            N = N // i
        elif N % i > 0:
            i += 1
    if len(result) > 2:
        return 'YES'
    else:
        return 'NO'

def main():
    N = int(input())
    print(sosuiya(N))

if __name__ == '__main__':
    main()