using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;
using System.IO;
using System.Diagnostics;

class Scanner
{
    private readonly char Separator = ' ';
    private int Index = 0;
    private string[] Line = new string[0];
    public string Next()
    {
        if (Index >= Line.Length)
        {
            Line = Console.ReadLine().Split(Separator);
            Index = 0;
        }
        var ret = Line[Index];
        Index++;
        return ret;
    }

    public int NextInt()
    {
        return int.Parse(Next());
    }

}

class Magatro
{
    private readonly int Mod = (int)1e9 + 7;
    private int N;

    private long[] F;

    private void Scan()
    {
        N = int.Parse(Console.ReadLine());
    }

    private void ClacF()
    {
        F = new long[N+1];
        F[0] = 1;
        for (int i = 1; i <= N; i++)
        {
            F[i] = (F[i - 1] * i) % Mod;
        }
    }
    private long Fact(long n)
    {
        return F[n];
    }

    private long Pow(long a, long b)
    {
        long res = 1;
        while (b > 0)
        {
            if (b % 2 == 1)
            {
                res *= a;
                res %= Mod;
            }
            b /= 2;
            a *= a;
            a %= Mod;
        }
        return res;
    }

    private long C(long n, long m)
    {
        long bunsi = Fact(n);
        long bunbo = (Fact(m) * Fact(n - m)) % Mod;
        long gyakugen = Pow(bunbo, Mod - 2);
        return (bunsi * gyakugen) % Mod;
    }

    public void Solve()
    {
        Scan();
        ClacF();
        long ans = 0;
        for(int i=1;i<=N;i++)
        {
            ans += (C(N, i) * Pow(i, N - i))%Mod;
            ans %= Mod;
        }
        Console.WriteLine(ans);
    }

    static public void Main()
    {
        new Magatro().Solve();

    }
}