13682391 has 4 divisors (see below), whose sum is σ = 18243192. Its totient is φ = 9121592.

The previous prime is 13682371. The next prime is 13682407. The reversal of 13682391 is 19328631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13682391 - 2⁵ = 13682359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13682371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2280396 + ... + 2280401.

It is an arithmetic number, because the mean of its divisors is an integer number (4560798).

Almost surely, 2^13682391 is an apocalyptic number.

13682391 is a deficient number, since it is larger than the sum of its proper divisors (4560801).

13682391 is an equidigital number, since it uses as much as digits as its factorization.

13682391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4560800.

The product of its digits is 7776, while the sum is 33.

The square root of 13682391 is about 3698.9716138408. The cubic root of 13682391 is about 239.1776892108.

The spelling of 13682391 in words is "thirteen million, six hundred eighty-two thousand, three hundred ninety-one".