13081690 has 32 divisors (see below), whose sum is σ = 25597440. Its totient is φ = 4795200.

The previous prime is 13081667. The next prime is 13081699. The reversal of 13081690 is 9618031.

It is a happy number.

It is a super-2 number, since 2×13081690² = 342261226512200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13081699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4780 + ... + 7000.

It is an arithmetic number, because the mean of its divisors is an integer number (799920).

Almost surely, 2^13081690 is an apocalyptic number.

13081690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13081690 is a deficient number, since it is larger than the sum of its proper divisors (12515750).

13081690 is a wasteful number, since it uses less digits than its factorization.

13081690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 13081690 is about 3616.8618994924. The cubic root of 13081690 is about 235.6249549118.

The spelling of 13081690 in words is "thirteen million, eighty-one thousand, six hundred ninety".