---
id: 5900f3ab1000cf542c50febe
challengeType: 5
title: 'Problem 63: Powerful digit counts'
---
## Description
The 5-digit number, 16807=75, is also a fifth power. Similarly, the 9-digit number, 134217728=89, is a ninth power.
How many n-digit positive integers exist which are also an nth power?
## Instructions
## Tests
```yml
tests:
- text: euler63() should return 49.
testString: assert.strictEqual(euler63(), 49, 'euler63() should return 49.');
```
## Challenge Seed
```js
function euler63() {
// Good luck!
return true;
}
euler63();
```