13312591 has 2 divisors, whose sum is σ = 13312592. Its totient is φ = 13312590.

The previous prime is 13312589. The next prime is 13312633. The reversal of 13312591 is 19521331.

13312591 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13312591 - 2¹ = 13312589 is a prime.

Together with 13312589, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13312391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656295 + 6656296.

It is an arithmetic number, because the mean of its divisors is an integer number (6656296).

Almost surely, 2^13312591 is an apocalyptic number.

13312591 is a deficient number, since it is larger than the sum of its proper divisors (1).

13312591 is an equidigital number, since it uses as much as digits as its factorization.

13312591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810, while the sum is 25.

The square root of 13312591 is about 3648.6423502448. The cubic root of 13312591 is about 237.0031927027.

The spelling of 13312591 in words is "thirteen million, three hundred twelve thousand, five hundred ninety-one".