The number 1729 is known as the Hardy–Ramanujan number, famous for being the smallest number expressible as the sum of two cubes in two different ways.
Notes on verification
Confirmed by multiple independent authoritative sources including Wolfram MathWorld and American Scientist, consistent with the well-known Hardy-Ramanujan taxicab anecdote. [tier=unverified indep_score=0.3 clusters=2 claim_tier=notable] [rescored 2026-09-15: curated origin-host map (PR #65); unclassified hosts no longer scored as aggregators]
Sources
- List of mathematics history topics (wikipedia)
- https://mathworld.wolfram.com/Hardy-RamanujanNumber.html (corroboration)
- https://www.americanscientist.org/article/never-a-dull-number (corroboration)
- https://mathworld.wolfram.com/1729.html (corroboration)