johan because Johan Liebert is the one true God. Johan with a small 'j' because none can equal Johan, we can only follow in his footsteps as lesser beings, as understudies. (Hence the _ )
The 5179 has a very long and slightly embarrassing story behind it. Suffice it to say that a 13-year-old me found a message of true friendship in these numbers, and I have used these numbers in every account I have made since 2008.