13697439 has 16 divisors (see below), whose sum is σ = 20939520. Its totient is φ = 7801920.

The previous prime is 13697429. The next prime is 13697471. The reversal of 13697439 is 93479631.

It is not a de Polignac number, because 13697439 - 2¹¹ = 13695391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13697439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13697429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7099 + ... + 8819.

It is an arithmetic number, because the mean of its divisors is an integer number (1308720).

Almost surely, 2^13697439 is an apocalyptic number.

13697439 is a deficient number, since it is larger than the sum of its proper divisors (7242081).

13697439 is a wasteful number, since it uses less digits than its factorization.

13697439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110.

The product of its digits is 122472, while the sum is 42.

The square root of 13697439 is about 3701.0051337441. The cubic root of 13697439 is about 239.2653402462.

The spelling of 13697439 in words is "thirteen million, six hundred ninety-seven thousand, four hundred thirty-nine".