This number is a prime.

+ 6! - 5! + 4! - 3! + 2! - 1!. [Guy]

+ The first person to be converted to Islam (Khadija, Prophet Muhammad's first wife) died in 619.

+ 619 = prime(6*19). The largest zerofree prime p such that π(p) is the product of the first digit of p and the rest of the number. [Firoozbakht]

+ According to Urantia, a religious sect headquartered in Chicago, we live on a planet in a system that includes 619 flawed but evolving worlds.

+ The smallest strobogrammatic prime that is not a palindrome. [Punches]

+ NFL player Reggie Bush puts 619 on top of his eyeblack as a tribute to the area code of southeast San Diego county.

+ Juneteenth is on "6/19."

+ Nova 619 is a webcomic.

+ The "619" is Rey Mysterio's signature finishing move. [Tittle]

+ The only strobogrammatic prime with distinct digits. [Gudipati]

+ TIO (Try It Online) once hosted 619 practical and recreational programming languages.

+ The smallest prime number that starts a series of five consecutive primes (619, 631, 641, 643, and 647) such that their sum (3181) is prime, the sum of their squares (2024261) is prime, the sum of their cubes (1288478701) is prime, and the sum of these three sums (1290506143) is prime. The next such prime number is 4603. [Goelz]

+ The largest 3-digit strobogrammatic prime. [Loungrides]

+ The only known strobogrammatic prime that is the sum of three consecutive triangular numbers with prime indices (153+190+276 = 619). [Bajpai]

+ The only prime of form p^4-6, (case p=5). Note that for any other prime p this form creates a composite divided by 5. [Loungrides]

+ 619 is the largest prime P3 of a trío of non consecutive primes P1, P2 and P3, {487,523,619}, such that their concatenations P1.P2.P3 is a zero-less pandigital and at the same time, P3-P1 is minimal. [Rivera]

+ The only non-palindromic strobogrammatic prime that is the sum of three distinct primes with distinct prime digits, i.e., 619 = 23 + 73 + 523. [Sariyar]

+ The smallest strobogrammatic prime such that between it and next prime are a strobogrammatic number of composites. [Sariyar]

(There is one curio for this number that has not yet been approved by an editor.)

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell