13877691 has 16 divisors (see below), whose sum is σ = 19071360. Its totient is φ = 8971200.

The previous prime is 13877687. The next prime is 13877741. The reversal of 13877691 is 19677831.

13877691 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13877691 - 2² = 13877687 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13877641) 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, 22791 + ... + 23391.

It is an arithmetic number, because the mean of its divisors is an integer number (1191960).

Almost surely, 2^13877691 is an apocalyptic number.

13877691 is a deficient number, since it is larger than the sum of its proper divisors (5193669).

13877691 is a wasteful number, since it uses less digits than its factorization.

13877691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its digits is 63504, while the sum is 42.

The square root of 13877691 is about 3725.2773051143. The cubic root of 13877691 is about 240.3103104137.

The spelling of 13877691 in words is "thirteen million, eight hundred seventy-seven thousand, six hundred ninety-one".