## Thinking Mathematically (6th Edition)

A number is said to be a narcissistic number when its own digits are raised to the power of the number of digits and then all of them are summed up together and forms the original number. So, here the provided number is $371$. Total number of digits is $3$. Therefore, \begin{align} & {{3}^{3}}+{{7}^{3}}+{{1}^{3}}=27+343+1 \\ & =371 \end{align}. So, $371$is a narcissistic number..