13291591 has 6 divisors (see below), whose sum is σ = 13735176. Its totient is φ = 12861900.

The previous prime is 13291589. The next prime is 13291613. The reversal of 13291591 is 19519231.

It is a happy number.

13291591 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13291591 - 2¹ = 13291589 is a prime.

It is a super-2 number, since 2×13291591² = 353332782622562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13291511) 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, 5955 + ... + 7876.

It is an arithmetic number, because the mean of its divisors is an integer number (2289196).

Almost surely, 2^13291591 is an apocalyptic number.

13291591 is a deficient number, since it is larger than the sum of its proper divisors (443585).

13291591 is an equidigital number, since it uses as much as digits as its factorization.

13291591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13893 (or 13862 counting only the distinct ones).

The product of its digits is 2430, while the sum is 31.

The square root of 13291591 is about 3645.7634317108. The cubic root of 13291591 is about 236.8785065722.

The spelling of 13291591 in words is "thirteen million, two hundred ninety-one thousand, five hundred ninety-one".