As a Founder Where Do Spend Your Time (I will not promote)

As a founder, where do you spend most of your time in the business? Working on the product? Acquiring new customers? Marketing? Validating your idea? Is there a right balance to this? There is soooo much you could of course be doing, the list is endless and more ideas come up as soon as you close one off. I often find it hard to know where to split the time and be most effective. And if there are more than one of you, do you find you split these tasks up, or are you both/all working across different areas? I'm in a very early business and we all bring something slightly different, but we're not from entirely different areas. Have you outsourced any area out yet? i.e. are you paying for someone to do product dev or marketing/socials etc? I will not promote.