The idea of angel numbers might have come from jewish mystical number philosophy. Today it is regarded as a subject of a diverse spiritual movement that includes mystical beliefs and complex relationships to religions and weird rites. It is massively used in online commerce and print media. There is a long way from the jewish Kabbala from the Pythagorean philosophers to the Bible to the expensive online calculators that determine your personal day after you had your first sip of tea. sigh