13091685 has 16 divisors (see below), whose sum is σ = 20993280. Its totient is φ = 6966720.

The previous prime is 13091677. The next prime is 13091693. The reversal of 13091685 is 58619031.

It is an interprime number because it is at equal distance from previous prime (13091677) and next prime (13091693).

It is not a de Polignac number, because 13091685 - 2³ = 13091677 is a prime.

It is a super-2 number, since 2×13091685² = 342784432278450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 10020 + ... + 11250.

It is an arithmetic number, because the mean of its divisors is an integer number (1312080).

Almost surely, 2^13091685 is an apocalyptic number.

13091685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13091685 is a deficient number, since it is larger than the sum of its proper divisors (7901595).

13091685 is a wasteful number, since it uses less digits than its factorization.

13091685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 13091685 is about 3618.2433583163. The cubic root of 13091685 is about 235.6849489923.

The spelling of 13091685 in words is "thirteen million, ninety-one thousand, six hundred eighty-five".