13685447 has 4 divisors (see below), whose sum is σ = 13718376. Its totient is φ = 13652520.

The previous prime is 13685423. The next prime is 13685461. The reversal of 13685447 is 74458631.

13685447 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13685447 - 2¹⁶ = 13619911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13685447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13685417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15833 + ... + 16674.

It is an arithmetic number, because the mean of its divisors is an integer number (3429594).

Almost surely, 2^13685447 is an apocalyptic number.

13685447 is a deficient number, since it is larger than the sum of its proper divisors (32929).

13685447 is an equidigital number, since it uses as much as digits as its factorization.

13685447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32928.

The product of its digits is 80640, while the sum is 38.

The square root of 13685447 is about 3699.3846785648. The cubic root of 13685447 is about 239.1954948854.

The spelling of 13685447 in words is "thirteen million, six hundred eighty-five thousand, four hundred forty-seven".