13291789 has 6 divisors (see below), whose sum is σ = 15461934. Its totient is φ = 11392920.

The previous prime is 13291781. The next prime is 13291793. The reversal of 13291789 is 98719231.

13291789 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 1334025 = 3458^2 + 1155^2 .

It is not a de Polignac number, because 13291789 - 2³ = 13291781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13291781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135582 + ... + 135679.

It is an arithmetic number, because the mean of its divisors is an integer number (2576989).

Almost surely, 2^13291789 is an apocalyptic number.

It is an amenable number.

13291789 is a deficient number, since it is larger than the sum of its proper divisors (2170145).

13291789 is an equidigital number, since it uses as much as digits as its factorization.

13291789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271275 (or 271268 counting only the distinct ones).

The product of its digits is 27216, while the sum is 40.

The square root of 13291789 is about 3645.7905864161. The cubic root of 13291789 is about 236.8796827974.

The spelling of 13291789 in words is "thirteen million, two hundred ninety-one thousand, seven hundred eighty-nine".