P = [i for i in range(10**7+1)]
for i in range(2,int((10**7)**0.5)+1):
    for j in range(i*i,10**7+1,i):
        P[j]=P[i]
Q = []
for i in range(2,10**7+1):
    if P[i]==i:
        Q.append(i)
N = int(input())
X = N
C = {}
flag = 0
for q in Q:
    while N%q==0:
        if q not in C:
            C[q] = 0
        C[q] += 1
        if C[q]>1:
            flag = 1
        N = N//q
if N>1:
    C[N]=1
if X==1:
    print("NO")
elif len(C)>2 or flag==1:
    print("YES")
else:
    print("NO")