13508013 has 16 divisors (see below), whose sum is σ = 19192896. Its totient is φ = 8421120.

The previous prime is 13508003. The next prime is 13508017. The reversal of 13508013 is 31080531.

It is a happy number.

It is not a de Polignac number, because 13508013 - 2⁸ = 13507757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13508017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8058 + ... + 9588.

It is an arithmetic number, because the mean of its divisors is an integer number (1199556).

Almost surely, 2^13508013 is an apocalyptic number.

It is an amenable number.

13508013 is a deficient number, since it is larger than the sum of its proper divisors (5684883).

13508013 is a wasteful number, since it uses less digits than its factorization.

13508013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 13508013 is about 3675.3248835987. The cubic root of 13508013 is about 238.1572590131.

Adding to 13508013 its reverse (31080531), we get a palindrome (44588544).

The spelling of 13508013 in words is "thirteen million, five hundred eight thousand, thirteen".