What is this?

Python 2.7:

1
2
3
4
5
6
7

def narcissist(n):
    digits = len(str(n))
    return n == sum([int(c)**digits for c in str(n)])
for n in xrange(100,1000):
    if narcissist(n):
        print n
        break

153=1^3+5^3+3^3

=1+125+27

=153

A narcissistic number is that number where the sums of the cubes of the digits is equal to the number itself.

The smallest $3-digit$ narcissistic number is 153.