Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

Unique Properties of 97

  • 97 is the smallest prime that has a prime alphabetical value in its Roman numerals-based representation (XCVII): 24 + 3 + 22 + 9 + 9 = 67
  • There are 97 leap days every 400 years in the Gregorian Calendar
  • 97 is the largest two-digit prime
  • 97 is the smallest prime occurring only once in its decade
  • 97 is the smallest prime p such that p and p+4 are sandwiching three consecutive non-squarefree numbers (submitted by Massimo Kofler)

Common Properties of 97

Deficient
Happy
Odd
Odious
Prime
Square-free
Ulam