function factorize (n)
    local factors = {}
    for i = 2, n do
        if i * i > n then
            break
        end
        while n % i == 0 do
            n = n / i
            table.insert(factors, i)
        end
    end
    if n > 1 then
        table.insert(factors, n)
    end
    return factors
end


n = io.read("*n")
factors = factorize(n)
if #factors >= 3 then
    print("YES")
else
    print("NO")
end