12887613 has 16 divisors (see below), whose sum is σ = 19923840. Its totient is φ = 8217792.

The previous prime is 12887603. The next prime is 12887617. The reversal of 12887613 is 31678821.

12887613 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12887613 - 2⁶ = 12887549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12887617) 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, 9756 + ... + 10997.

It is an arithmetic number, because the mean of its divisors is an integer number (1245240).

Almost surely, 2^12887613 is an apocalyptic number.

It is an amenable number.

12887613 is a deficient number, since it is larger than the sum of its proper divisors (7036227).

12887613 is a wasteful number, since it uses less digits than its factorization.

12887613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20785 (or 20779 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 12887613 is about 3589.9321720612. The cubic root of 12887613 is about 234.4539183837.

The spelling of 12887613 in words is "twelve million, eight hundred eighty-seven thousand, six hundred thirteen".