13087138 has 16 divisors (see below), whose sum is σ = 20575296. Its totient is φ = 6231280.

The previous prime is 13087111. The next prime is 13087153. The reversal of 13087138 is 83178031.

13087138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12993 + ... + 13963.

It is an arithmetic number, because the mean of its divisors is an integer number (1285956).

Almost surely, 2^13087138 is an apocalyptic number.

13087138 is a deficient number, since it is larger than the sum of its proper divisors (7488158).

13087138 is a wasteful number, since it uses less digits than its factorization.

13087138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 13087138 is about 3617.6149601637. The cubic root of 13087138 is about 235.6576598247.

It can be divided in two parts, 13087 and 138, that added together give a square (13225 = 115²).

The spelling of 13087138 in words is "thirteen million, eighty-seven thousand, one hundred thirty-eight".