97 is the smallest prime that is the sum of a prime number of consecutive primes as well as the sum of a composite number of consecutive composite numbers: 97 = 29 + 31 + 37 = 22 + 24 + 25 + 26.
The first four pairs of digits following the decimal point of 1/97 are powers of three: 1/97 = 0.01030927. . . .
97 has a representation as a sum of two squares: 97 = 42 + 92.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgg9rC2MBZoMtJ_VaCEr4QYLXg1VEsWGoYhlN6zzW24yzyllHQvwNUFvZeOlph__un2a5Pqxl_cnSiGAnv5jyGPqEgOAsm_ChQKahmFUo5qypVu70PUzL3_6Sc_BpjW5BhaLY5zG7cwuhA/s400/n0097.jpg)
The Gregorian calendar has 97 leap days every 400 years.
Source: Prime Curios!
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgg9rC2MBZoMtJ_VaCEr4QYLXg1VEsWGoYhlN6zzW24yzyllHQvwNUFvZeOlph__un2a5Pqxl_cnSiGAnv5jyGPqEgOAsm_ChQKahmFUo5qypVu70PUzL3_6Sc_BpjW5BhaLY5zG7cwuhA/s400/n0097.jpg)
The Gregorian calendar has 97 leap days every 400 years.
Source: Prime Curios!
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