13081688 has 16 divisors (see below), whose sum is σ = 24570000. Its totient is φ = 6529696.

The previous prime is 13081667. The next prime is 13081699. The reversal of 13081688 is 88618031.

It is a happy number.

13081688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13081688² = 342261121858688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5738 + ... + 7686.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^13081688 is an apocalyptic number.

It is an amenable number.

13081688 is a deficient number, since it is larger than the sum of its proper divisors (11488312).

13081688 is a wasteful number, since it uses less digits than its factorization.

13081688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2794 (or 2790 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 35.

The square root of 13081688 is about 3616.8616230097. The cubic root of 13081688 is about 235.6249429040.

It can be divided in two parts, 130 and 81688, that added together give a palindrome (81818).

The spelling of 13081688 in words is "thirteen million, eighty-one thousand, six hundred eighty-eight".