This number is a prime.
A prime obtained by concatenating in descending order the decimal equivalents of the true minterms in the 3-variable Boolean function F(a,b,c)=abc'+ab'c+a'bc. [Necula]
This prime can be expressed as the sum of squares of five consecutive primes: 5^2 + 7^2 + 11^2 + 13^2 + 17^2. [Patterson]
The first 3-digit prime number to occur in the decimal expansion of π.
The only known prime where 5 is neither a primitive root
nor a quadratic residue of 4n2 + 1. [Gudipati]
MGMT 653 is a program designed to integrate years of
advanced study by Wharton MBA students, as they apply what
they have learned to the problems of organizations in the
The first digit of 653 appears 653 times in triangular numbers with distinct digits only. [Gaydos]
"I was up at six fifty-three every morning to exercise."
From MATH WARRIORS: Season 1, Episode 1 - "Prime-mates".
(There is one curio for this number that has not yet been approved by an editor.)
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