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381654729 (Posted on 2022-07-23) Difficulty: 4 of 5
The above number is known to many mathematicians and appeared as a solution to a flooble puzzle called “digits 1-9” thus implying that the number is a zeroless pandigital.
The solution showed another feature - this number is also poly-divisible, I.e. as a nine digit number it is divisible by nine, erase the last digit It becomes divisible by 8,…and so on.
There many features connected with our number, but the most important , which I ask you to

PROVE: 381654729 is a Friedman number

Definition and examples @ OEIS A036057
REM: proving does not mean to find somewhere the answer, but to solve it.

No Solution Yet Submitted by Ady TZIDON    
Rating: 1.0000 (1 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Hints/TipsSorry Wrong numberAdy TZIDON2022-07-30 16:54:07
re(3): Hint? @ CharlieCharlie2022-07-30 15:10:33
re(2): Hint?Ady TZIDON2022-07-30 09:54:12
re(2): Hint? @ CharlieAdy TZIDON2022-07-26 02:02:15
re: Hint?Charlie2022-07-25 15:50:41
QuestionHint?Ady TZIDON2022-07-25 09:51:19
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