19

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This article is about a particular natural number.|View all articles on particular natural numbers

Summary

Factorization

The number 19 is a prime number.

Prime-generating polynomials

Below are some polynomials that give prime numbers for small input values, which give the value 19 for suitable input choice.

Polynomial Degree Some values for which it generates primes Input value at which it generates 19
2 all numbers 1-16, because 17 is one of the lucky numbers of Euler. 2

Multiples

Interesting multiples

Number Prime factorization What's interesting about it
1729 7 times 13 times 19 third Carmichael number, i.e., absolute pseudoprime
Smallest number expressible as a sum of two positive cubes in two different ways.