package main

import . "fmt"
import . "sort"
import . "math"

const M = 998244353

func main() {
	
	ps := []*P{}
	
	for i := 2; i <= 1e6; i++ {
		for k,v := 3,i*i*i; v <= 1e18; k,v =k+1,v*i {
			ps=append(ps,&P{v,i,k})
			if int(1e18+v-1)/v < i {
				break
			}
		}
	}
	
	Slice(ps, func(i, j int) bool {
		return ps[i].value < ps[j].value
	})
	

	var n int
	Scan(&n)
	
	if n > 1e10 {
		Println(-1)
		return
	}
	
	ms := make([]int, 60)
	for i := range ms {
		ms[i] = 1
	}
	
	ans := 0
	next := 1
	for next <= n && len(ps) > 0 {
		last := ps[0]
		ps = ps[1:]
		mm := 1
		for _, m := range ms[3:] {
			mm = mm*m%M
		}
		lower := int(Sqrt(float64(next)))
		upper := int(Sqrt(float64(last.value-1)))
		for s := lower; s <= upper; s++ {
			a := s*s
			b := (s+1)*(s+1)-1
			if s == lower {
				a = next
			}
			if s == upper {
				b = min(n, last.value-1)
			}
			t := b*(b+1)/2 - a*(a-1)/2
			ans += t%M*s%M*mm%M
			ans %= M
		}
		next = last.value
		ms[last.power] = last.base
		for len(ps) > 0 && last.value == ps[0].value {
			p := ps[0]
			ps = ps[1:]
			ms[p.power] = p.base
		}
	}

	Println(ans)	
}

type P struct { value, base, power int }