13687839 has 32 divisors (see below), whose sum is σ = 23431680. Its totient is φ = 7804800.

The previous prime is 13687831. The next prime is 13687853. The reversal of 13687839 is 93878631.

It is a happy number.

It is not a de Polignac number, because 13687839 - 2³ = 13687831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13687794 and 13687803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13687831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3694 + ... + 6404.

It is an arithmetic number, because the mean of its divisors is an integer number (732240).

Almost surely, 2^13687839 is an apocalyptic number.

13687839 is a deficient number, since it is larger than the sum of its proper divisors (9743841).

13687839 is a wasteful number, since it uses less digits than its factorization.

13687839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2748 (or 2742 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 13687839 is about 3699.7079614478. The cubic root of 13687839 is about 239.2094299385.

The spelling of 13687839 in words is "thirteen million, six hundred eighty-seven thousand, eight hundred thirty-nine".