13597839 has 24 divisors (see below), whose sum is σ = 20723040. Its totient is φ = 8578752.

The previous prime is 13597823. The next prime is 13597861. The reversal of 13597839 is 93879531.

It is a happy number.

It is not a de Polignac number, because 13597839 - 2⁴ = 13597823 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13597794 and 13597803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13597819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13342 + ... + 14324.

It is an arithmetic number, because the mean of its divisors is an integer number (863460).

Almost surely, 2^13597839 is an apocalyptic number.

13597839 is a deficient number, since it is larger than the sum of its proper divisors (7125201).

13597839 is a wasteful number, since it uses less digits than its factorization.

13597839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071 (or 1068 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 13597839 is about 3687.5247795778. The cubic root of 13597839 is about 238.6839949845.

The spelling of 13597839 in words is "thirteen million, five hundred ninety-seven thousand, eight hundred thirty-nine".