**1729 is a special number because it is the smallest number that can be expressed as the sum of two cubes in two different ways. This is known as the Ramanujan-Taxicab number, named after the Indian mathematician Srinivasa Ramanujan.**

## Why is 1728 a special number?

The number 1728 is special because it is the sum of the first six prime numbers, 2, 3, 5, 7, 11, 13. These prime numbers are very important in mathematics and have many practical applications. For example, 1728 can be used to generate many different types of mathematical sequences, such as the Fibonacci sequence.

## Why 1729 is a magic number?

There are a few reasons why 1729 is considered a magic number. For one, it is the year that Sir Isaac Newton published his famous book, “Philosophiae Naturalis Principia Mathematica.”

Additionally, 1729 is the year that King George II of Great Britain was crowned, which signaled the beginning of the British Empire. Lastly, 1729 is also the year that the Treaty of Paris was signed, ending the War for Independence between Britain and her former colonies in North America.

All of these events are significant in shaping the world as we know it.

## Is 1729 a perfect cube?

There are many ways to answer this question. A simple answer is that 1729 is not a perfect cube.

This is because there are six different ways to divide 1729 into three equal parts. Each of these partitions has an odd number of elements, so 1729 cannot be divided into three equal parts without generating an odd number of elements.

## What is ramanujan number?

Ramanujan number is an odd number that is divisible by both 3 and 5. It is also the only number that is the sum of the squares of two other prime numbers. Ramanujan discovered this number in 1914.

## Why is 729 a special number?

729 is special because it is the sum of the first six prime numbers.

## Conclusion

1729 is a special number because it is the smallest number that can be expressed as the sum of two cubes in two different ways. This makes it a so-called “taxicab number”.