# 1009

This number is a prime.

The smallest prime that can be expressed in the form x^{2} + *n*y^{2} for all values of *n* from 1 to 10. [Ashbacher]

The smallest prime or emirp greater than a thousand. [Gevisier]

The smallest prime whose fifth power is pandigital (i.e., containing all digits from 0 to 9). [Gupta]

The smallest number which is the sum of three distinct
positive cubes in more than one
way: 1^{3} + 2^{3} + 10^{3} and 4^{3} + 6^{3} + 9^{3}. [Beedassy]

The smallest prime, when written in English, that contains the letter 'a.' [Patterson]

The smallest emirp which yields an emirpimes when turned upside down. [Capelle]

MIX's model number in Donald Knuth's monograph, *The Art of Computer Programming*. ("MIX" equals 1009 in Roman numerals.) [Nowacki]

The sum of the cubes of the first three semiprimes. [Silva]

The smallest prime with a non-prime number of only non-prime digits. [Beedassy]

The smallest odd prime number of "hyperforests" on n unlabeled nodes (case n=9). [Post]

The smallest emirp with a multiplicative persistence equal to its digital root. [Beedassy]

The smallest emirp that can be represented as sum of a prime plus its reversal in two ways, i.e., 257+752=653+356. [Loungrides]

In the 2002 movie *Minority
Report*, John Anderton goes upstairs to room 1009,
then realizes that Leo Crow is really in room 1006. [Wesolowski]

There were 1009 distinct submitters on the website "Prime Curios!" as of Friday the 13th, 2018. [Homewood]

The smallest prime p such that p^2 (1018081) and (reversal(p))^2 (81018001) each contain all of cube digits {0, 1, 8} only. [Bajpai]