N = int(input())
if N == 1:
    print("NO")
    exit()

def isp(x):
    for i in range(2, int(x ** 0.5) + 1):
        if x % i == 0:
            return False
    return True
if isp(N):
    print("NO")
    exit()

for i in range(2, int(N ** 0.5) + 1):
    if N % i == 0:
        N //= i
        break
if isp(N):
    print("NO")
    exit()
for i in range(2, int(N ** 0.5) + 1):
    if N % i == 0:
        N //= i
        break
if N == 1:
    print("NO")
else:
    print("YES")