13678591 has 8 divisors (see below), whose sum is σ = 14570064. Its totient is φ = 12796800.

The previous prime is 13678589. The next prime is 13678603. The reversal of 13678591 is 19587631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13678591 - 2¹ = 13678589 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 (13678541) 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 in 7 ways as a sum of consecutive naturals, for example, 616 + ... + 5266.

It is an arithmetic number, because the mean of its divisors is an integer number (1821258).

Almost surely, 2^13678591 is an apocalyptic number.

13678591 is a deficient number, since it is larger than the sum of its proper divisors (891473).

13678591 is a wasteful number, since it uses less digits than its factorization.

13678591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4841.

The product of its digits is 45360, while the sum is 40.

The square root of 13678591 is about 3698.4579218912. The cubic root of 13678591 is about 239.1555449483.

It can be divided in two parts, 136 and 78591, that multiplied together give a triangular number (10688376 = T₄₆₂₃).

The spelling of 13678591 in words is "thirteen million, six hundred seventy-eight thousand, five hundred ninety-one".