Numbers 290,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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293,999

[Math.]  A right-truncatable prime number: self, 29399, 2939, 293, 29 and 2 are prime numbers.

 

294,063

[Math.]  Two consecutive sums of consecutive numbers:

4356+…+4422 = 4423+…+4488 = 294,063.

 

294,409

[Math.]  The smallest Carmichael number which is the product of 2 Carmichael numbers: 509,033,161 = 1729×294,409. (294,409 = 37×73×109).

 

294,685

[Math.]  One of Markov numbers are… 75025, 96557, 135137, 195025, 196418, 294685, 426389, 499393, 514229, 646018, 925765…

 

294,849

[Math.] Square and cube of number 543 using different digits: 5432 = 294,849 and 5433 = 160,103,007.

 

294,896 & 295,488

[Math.]  The 2nd known amicable/sociable number chain: 14316 → 19116 → 31704 → 47616 → 83328 → 177792 → 295488 → 629072 → 589786 → 294896 → 358336 → 418904 → 366556 → 274924 → 275444 → 243760 → 376736 → 381028 → 285778 → 152990 → 122410 → 97946 → 48976 → 45946 → 22976 → 22744 → 19916 → 17716 → 14316. (of 28 links, currently the longest, found by  P. Poulet, 1918)

 

296,675

[Math.]  296,675 = 12+23+34+45+56+67 = 01+12+23+34+45+56+67.

  

297,025

[Math.]  (454+545 = 999 = 434+565)

4542 = 206,116 & 206+116 = 322

5452 = 297,025 & 297+025 = 322

and

4342 = 188,356 & 188+356 = 544

5652 = 319,225 & 319+225 = 544.

  

298,320

[Math.]  The 31st Keith number.

 

299,792.458

[Science]  The speed (km/s, kilometers/second) of light in vacuum, (186,282 miles/second).

 

299,996

[Math.]

296×333,667 = 98,765,432

2,996×33,336,667 = 99,876,654,332

29,996×3,333,366,667 = 99,987,666,543,332

299,996×333,333,666,667 = 99,998,766,665,433,332

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