13697685 has 12 divisors (see below), whose sum is σ = 23742732. Its totient is φ = 7305408.

The previous prime is 13697653. The next prime is 13697687. The reversal of 13697685 is 58679631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9400356 + 4297329 = 3066^2 + 2073^2 .

It is not a de Polignac number, because 13697685 - 2⁵ = 13697653 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 304393 = 13697685 / (1 + 3 + 6 + 9 + 7 + 6 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 13697685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13697687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 152152 + ... + 152241.

It is an arithmetic number, because the mean of its divisors is an integer number (1978561).

Almost surely, 2^13697685 is an apocalyptic number.

13697685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13697685 is a deficient number, since it is larger than the sum of its proper divisors (10045047).

13697685 is a wasteful number, since it uses less digits than its factorization.

13697685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304404 (or 304401 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 13697685 is about 3701.0383678098. The cubic root of 13697685 is about 239.2667726045.

The spelling of 13697685 in words is "thirteen million, six hundred ninety-seven thousand, six hundred eighty-five".