13808931 has 4 divisors (see below), whose sum is σ = 18411912. Its totient is φ = 9205952.

The previous prime is 13808917. The next prime is 13808941. The reversal of 13808931 is 13980831.

13808931 is digitally balanced in base 2 and base 4, because in such bases 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 an emirpimes, since its reverse is a distinct semiprime: 13980831 = 3 ⋅4660277.

It is a cyclic number.

It is not a de Polignac number, because 13808931 - 2¹⁰ = 13807907 is a prime.

It is a super-2 number, since 2×13808931² = 381373150725522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13808892 and 13808901.

It is not an unprimeable number, because it can be changed into a prime (13808911) 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, 2301486 + ... + 2301491.

It is an arithmetic number, because the mean of its divisors is an integer number (4602978).

Almost surely, 2^13808931 is an apocalyptic number.

13808931 is a deficient number, since it is larger than the sum of its proper divisors (4602981).

13808931 is an equidigital number, since it uses as much as digits as its factorization.

13808931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602980.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 13808931 is about 3716.0370019686. The cubic root of 13808931 is about 239.9127634335.

The spelling of 13808931 in words is "thirteen million, eight hundred eight thousand, nine hundred thirty-one".