N=int(input())
P=[1 for i in range(int(N**0.5)+2)]

for i in range(2,len(P)):
    if P[i]==1:
        for j in range(2,len(P)):
            if i*j<=len(P)-1:
                P[i*j]=0
D={}
for i in range(2,len(P)):
    if P[i]==1:
        D[i]=1

if N==1:
    print("NO")
elif N in D:
    print("NO")
else:
    F=0
    for k,v in D.items():
        if N%k==0:
            print("YES")
            exit()
    print("NO")