import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	final long MODULO = 1_000_000_000 + 7;
	long[] fac = new long[200000];
	long[] invfac = new long[200000];
	long[] inv = new long[200000];
	{
		fac[0] = 1;
		for (int i = 1; i < fac.length; ++i)
			fac[i] = i * fac[i - 1] % MODULO;
		inv[1] = 1;
		for (int i = 2; i < inv.length; ++i) {
			inv[i] = (MODULO - MODULO / i * inv[(int) MODULO % i] % MODULO) % MODULO;
		}
		invfac[0] = 1;
		for (int i = 1; i < invfac.length; ++i)
			invfac[i] = inv[i] * invfac[i - 1] % MODULO;
	}

	void run() {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long ans = 0;
		for (int k = 0; k <= n; ++k) {
			ans += C(n, k) * pow(k, n - k) % MODULO;
			ans %= MODULO;
		}
		System.out.println(ans);
	}

	long C(int n, int k) {
		return fac[n] * invfac[k] % MODULO * invfac[n - k] % MODULO;
	}

	long pow(long a, long n) {
		long ret = 1;
		for (; n > 0; n >>= 1, a = a * a % MODULO) {
			if (n % 2 == 1)
				ret = ret * a % MODULO;
		}
		return ret;
	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}