13387839 has 8 divisors (see below), whose sum is σ = 17867952. Its totient is φ = 8916480.

The previous prime is 13387813. The next prime is 13387841. The reversal of 13387839 is 93878331.

13387839 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13387839 - 2⁷ = 13387711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13387839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13387849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3487 + ... + 6239.

It is an arithmetic number, because the mean of its divisors is an integer number (2233494).

Almost surely, 2^13387839 is an apocalyptic number.

13387839 is a deficient number, since it is larger than the sum of its proper divisors (4480113).

13387839 is a wasteful number, since it uses less digits than its factorization.

13387839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4377.

The product of its digits is 108864, while the sum is 42.

The square root of 13387839 is about 3658.9396004854. The cubic root of 13387839 is about 237.4488990705.

The spelling of 13387839 in words is "thirteen million, three hundred eighty-seven thousand, eight hundred thirty-nine".