According to Wikipedia, a narcissistic number is…
In recreational number theory, a narcissistic number (also known as a pluperfect digital invariant (PPDI), an Armstrong number (after Michael F. Armstrong) or a plus perfect number) is a number that is the sum of its own digits each raised to the power of the number of digits.HUH?!
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Narcissistic Numbers aren’t actually that confusing if you know how to do a couple things. Here’s how you can spend your Math Minutes so that you can learn more about these peculiar numbers!
- Watch this video by Numberphile: https://youtu.be/4aMtJ-V26Z4
- Look at the list of Narcissistic Numbers on Wolfram Alpha: http://mathworld.wolfram.com/NarcissisticNumber.html
- Pick a Narcissistic Number to “work out” on paper to prove it works. See example below.