N = int(input())

def f(x):
    r = set()
    for i in range(1,int(x**0.5)+1):
        if x%i==0:
            r.add(x//i)
            r.add(i)
    r.discard(1)
    return r

l = f(N)

for i in l:
    for j in range(2,int(i**0.5)+1):
        if i%j==0:
            exit(print('YES'))
print('NO')