13871387 has 12 divisors (see below), whose sum is σ = 14912280. Its totient is φ = 12866688.

The previous prime is 13871383. The next prime is 13871393. The reversal of 13871387 is 78317831.

It is not a de Polignac number, because 13871387 - 2² = 13871383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13871387.

It is not an unprimeable number, because it can be changed into a prime (13871383) 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 11 ways as a sum of consecutive naturals, for example, 101183 + ... + 101319.

It is an arithmetic number, because the mean of its divisors is an integer number (1242690).

Almost surely, 2^13871387 is an apocalyptic number.

13871387 is a deficient number, since it is larger than the sum of its proper divisors (1040893).

13871387 is an equidigital number, since it uses as much as digits as its factorization.

13871387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 229 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 13871387 is about 3724.4310974966. The cubic root of 13871387 is about 240.2739175766.

The spelling of 13871387 in words is "thirteen million, eight hundred seventy-one thousand, three hundred eighty-seven".