What is a 4-digit number?

A 4-digit number is a number that has 4 digits where the first digit must be 1 or greater. On this page, we will answer three questions for you: What is the smallest 4-digit number? What is the largest 4-digit number? How many 4-digit numbers are there?

Smallest 4-digit number
The smallest 4-digit number is 1 followed by 3 zeros. This number is called one thousand.

Largest 4-digit number
The largest 4-digit number is 9 followed by another 3 nines. This number is called nine thousand nine hundred ninety-nine.

Total number of 4-digit numbers
There are a total of nine thousand different 4-digit numbers. nine thousand is 9 followed by 3 zeros.

Digit Numbers
Here you can learn about another digit number.

What is a 5-digit number?
Go here for information about the next digit number on our list that we have information about.