13856791 has 8 divisors (see below), whose sum is σ = 14951664. Its totient is φ = 12766080.

The previous prime is 13856789. The next prime is 13856831. The reversal of 13856791 is 19765831.

13856791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13856791 - 2¹ = 13856789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13856891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12156 + ... + 13246.

It is an arithmetic number, because the mean of its divisors is an integer number (1868958).

Almost surely, 2^13856791 is an apocalyptic number.

13856791 is a deficient number, since it is larger than the sum of its proper divisors (1094873).

13856791 is a wasteful number, since it uses less digits than its factorization.

13856791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081.

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

The square root of 13856791 is about 3722.4710878662. The cubic root of 13856791 is about 240.1896128877.

The spelling of 13856791 in words is "thirteen million, eight hundred fifty-six thousand, seven hundred ninety-one".