long int f(long int x){
int i,j=sqrt(x);
if(x<3)return 0;
if(!(x%2))return x/2;
for(i=3;i<=j;i+=2){
if(!(x%i))return x/i;
}
return 0;
}

int main(){
long int a;
scanf("%ld",&a);
puts(f(f(a))?"YES":"NO");
return 0;
}