#include <cstdio>

#define FOR(i, l, r) for(int i = (l)    ; i <  (r); i++)
#define REV(i, l, r) for(int i = (r) - 1; i >= (l); i--)
#define INC0(i, n) FOR(i, 0, n)
#define INC1(i, n) FOR(i, 1, (n) + 1)
#define DEC0(i, n) REV(i, 0, n)
#define DEC1(i, n) REV(i, 1, (n) + 1)

typedef long long   signed int LL;
typedef long long unsigned int LU;


LL n;
int comp[10000001];

int main() {
	scanf("%lld", &n);
	
	for(LL i = 2; i * i <= n; i++) {
		if(comp[i] == 0) {
			for(LL j = i * 2; j * j <= n; j += i) {
				comp[j] = 1;
			}
		}
	}
	
	int c = 0;
	LL t = n;
	for(LL i = 2; i * i <= n; i++) {
		if(comp[i] == 0) {
			while(t % i == 0) { t /= i; c++; }
		}
		if(t == 1) { break; }
	}
	
	if(t != 1) { c++; }
	
	printf("%s\n", c > 2 ? "YES" : "NO");
	
	return 0;
}