13811685 has 16 divisors (see below), whose sum is σ = 22861440. Its totient is φ = 7112000.

The previous prime is 13811669. The next prime is 13811687. The reversal of 13811685 is 58611831.

It is not a de Polignac number, because 13811685 - 2⁴ = 13811669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13811687) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15441 + ... + 16310.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^13811685 is an apocalyptic number.

13811685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13811685 is a deficient number, since it is larger than the sum of its proper divisors (9049755).

13811685 is a wasteful number, since it uses less digits than its factorization.

13811685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31788.

The product of its digits is 5760, while the sum is 33.

The square root of 13811685 is about 3716.4075395468. The cubic root of 13811685 is about 239.9287114658.

The spelling of 13811685 in words is "thirteen million, eight hundred eleven thousand, six hundred eighty-five".