The number 1729 is known as the Hardy–Ramanujan number because it is the smallest number expressible as the sum of two cubes in two different ways.
Sources
- List of mathematics history topics (en.wikipedia.org)
- https://mathworld.wolfram.com/Hardy-RamanujanNumber.html (mathworld.wolfram.com)
- https://www.americanscientist.org/article/never-a-dull-number (americanscientist.org)
- https://www.cantorsparadise.com/the-hardy-ramanujan-number-1729-929766161647?gi=ff1883a82fb1 (cantorsparadise.com)
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