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# Jenny's constant

Jenny's constant is the irrationl number ${\displaystyle (7^{e-{\frac {1}{e}}}-9)\pi ^{2}}$ that approximates the rational number 867.5309, famous from the Tommy Tutone song "867-5309/Jenny" (see A104175). Its decimal expansion is 867.53090198168540975582752249614318384... (see A182369). This number is believed to first have appeared identified as such in a Munroe xkcd cartoon.[1] A few people have noticed that "1981" (the year the song was released) appears in the decimal expansion of this number after the second zero from the decimal point.
1. xkcd, A Table of Slightly Wrong Equations and Identities Useful for Approximations and/or Trolling Teachers April 26, 2012, accessed April 27, 2012. The number is given as ${\displaystyle (7^{{\frac {e}{1}}-{\frac {1}{e}}}-9)\pi ^{2}}$