---
id: 69cfca90e8a0a6d4d6871c52
title: "Challenge 268: Narcissistic Number"
challengeType: 28
dashedName: challenge-268
---

# --description--

Given a positive integer, determine whether it is a narcissistic number.

- A number is narcissistic if the sum of each of its digits raised to the power of the total number of digits equals the number itself.

For example, 153 has 3 digits, and 1<sup>3</sup> + 5<sup>3</sup> + 3<sup>3</sup> = 153, so it is narcissistic.

# --hints--

`isNarcissistic(153)` should return `true`.

```js
assert.isTrue(isNarcissistic(153));
```

`isNarcissistic(154)` should return `false`.

```js
assert.isFalse(isNarcissistic(154));
```

`isNarcissistic(371)` should return `true`.

```js
assert.isTrue(isNarcissistic(371));
```

`isNarcissistic(512)` should return `false`.

```js
assert.isFalse(isNarcissistic(512));
```

`isNarcissistic(9)` should return `true`.

```js
assert.isTrue(isNarcissistic(9));
```

`isNarcissistic(11)` should return `false`.

```js
assert.isFalse(isNarcissistic(11));
```

`isNarcissistic(9474)` should return `true`.

```js
assert.isTrue(isNarcissistic(9474));
```

`isNarcissistic(6549)` should return `false`.

```js
assert.isFalse(isNarcissistic(6549));
```

# --seed--

## --seed-contents--

```js
function isNarcissistic(n) {

  return n;
}
```

# --solutions--

```js
function isNarcissistic(n) {
  const digits = String(n).split('');
  const power = digits.length;
  const sum = digits.reduce((acc, d) => acc + Math.pow(Number(d), power), 0);
  return sum === n;
}
```