We can convert from Number to String by String, toString, Type Coercion or Template String.
Version
ECMAScript 2015
String
let x = 123
String (x) // ?
Stringis a constructor function to create a Wrapper Object bynewStringis a normal function to convert from Number to String

toString
let x = 123
x.toString () // ?
We can also to use Number.prototype.toString to convert from Number to String.

Type Coercion
let x = 123
x + '' // ?
When using Number + String, Number is converted to String first. So we can use + Empty String to Convert from Number to String.

Template String
let x = 123;
`${x}` // ?
We can also use Template String to convert from Number to String.

Conclusion
StringandtoStringis the most intuitive way to convert from Number to String- Template String is another concise way to convert from Number to String