13138507 has 4 divisors (see below), whose sum is σ = 13149976. Its totient is φ = 13127040.

The previous prime is 13138493. The next prime is 13138511. The reversal of 13138507 is 70583131.

13138507 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13138507 - 2⁷ = 13138379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13138007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3798 + ... + 6379.

It is an arithmetic number, because the mean of its divisors is an integer number (3287494).

Almost surely, 2^13138507 is an apocalyptic number.

13138507 is a deficient number, since it is larger than the sum of its proper divisors (11469).

13138507 is a wasteful number, since it uses less digits than its factorization.

13138507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11468.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 13138507 is about 3624.7078502964. The cubic root of 13138507 is about 235.9655879634.

The spelling of 13138507 in words is "thirteen million, one hundred thirty-eight thousand, five hundred seven".