13808691 has 16 divisors (see below), whose sum is σ = 22031520. Its totient is φ = 8497440.

The previous prime is 13808689. The next prime is 13808699. The reversal of 13808691 is 19680831.

13808691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13808691 - 2¹ = 13808689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13808699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19320 + ... + 20021.

It is an arithmetic number, because the mean of its divisors is an integer number (1376970).

Almost surely, 2^13808691 is an apocalyptic number.

13808691 is a deficient number, since it is larger than the sum of its proper divisors (8222829).

13808691 is a wasteful number, since it uses less digits than its factorization.

13808691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39363 (or 39357 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 13808691 is about 3716.0047093619. The cubic root of 13808691 is about 239.9113735263.

The spelling of 13808691 in words is "thirteen million, eight hundred eight thousand, six hundred ninety-one".