Question

why 1729 is called hardy -Ramanujan number

Answer 1

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= = = = = = = PERFECT DIGITAL INVARIANT NUMBER: It is a number that can be expressed as some combination of its digits and various operations, powers etc. ... RAMANUJAM NUMBER OR HARDY-RAMANUJAM NUMBER: This number 1729 is the smallest number which can be expressed as the sum of two positive cubes in two different ways.


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