13871439 has 32 divisors (see below), whose sum is σ = 22256640. Its totient is φ = 8505216.

The previous prime is 13871437. The next prime is 13871447. The reversal of 13871439 is 93417831.

It is a happy number.

It is not a de Polignac number, because 13871439 - 2¹ = 13871437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13871437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21252 + ... + 21894.

It is an arithmetic number, because the mean of its divisors is an integer number (695520).

Almost surely, 2^13871439 is an apocalyptic number.

13871439 is a deficient number, since it is larger than the sum of its proper divisors (8385201).

13871439 is a wasteful number, since it uses less digits than its factorization.

13871439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716 (or 710 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 13871439 is about 3724.4380784220. The cubic root of 13871439 is about 240.2742178165.

The spelling of 13871439 in words is "thirteen million, eight hundred seventy-one thousand, four hundred thirty-nine".