13930831 has 4 divisors (see below), whose sum is σ = 13938664. Its totient is φ = 13923000.

The previous prime is 13930823. The next prime is 13930843. The reversal of 13930831 is 13803931.

13930831 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13930831 - 2³ = 13930823 is a prime.

It is a super-2 number, since 2×13930831² = 388136104701122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13930831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13930031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181 + ... + 5281.

It is an arithmetic number, because the mean of its divisors is an integer number (3484666).

Almost surely, 2^13930831 is an apocalyptic number.

13930831 is a deficient number, since it is larger than the sum of its proper divisors (7833).

13930831 is an equidigital number, since it uses as much as digits as its factorization.

13930831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7832.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13930831 is about 3732.4028453531. The cubic root of 13930831 is about 240.6166491958.

The spelling of 13930831 in words is "thirteen million, nine hundred thirty thousand, eight hundred thirty-one".