13587391 has 2 divisors, whose sum is σ = 13587392. Its totient is φ = 13587390.

The previous prime is 13587373. The next prime is 13587397. The reversal of 13587391 is 19378531.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19378531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13587391 - 2⁷ = 13587263 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13587391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13587397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6793695 + 6793696.

It is an arithmetic number, because the mean of its divisors is an integer number (6793696).

Almost surely, 2^13587391 is an apocalyptic number.

13587391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13587391 is an equidigital number, since it uses as much as digits as its factorization.

13587391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 37.

The square root of 13587391 is about 3686.1078389000. The cubic root of 13587391 is about 238.6228477842.

The spelling of 13587391 in words is "thirteen million, five hundred eighty-seven thousand, three hundred ninety-one".