12928879 has 4 divisors (see below), whose sum is σ = 13015800. Its totient is φ = 12841960.

The previous prime is 12928849. The next prime is 12928897. The reversal of 12928879 is 97882921.

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 12928879 - 2¹¹ = 12926831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12928819) 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, 43237 + ... + 43534.

It is an arithmetic number, because the mean of its divisors is an integer number (3253950).

Almost surely, 2^12928879 is an apocalyptic number.

12928879 is a deficient number, since it is larger than the sum of its proper divisors (86921).

12928879 is an equidigital number, since it uses as much as digits as its factorization.

12928879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86920.

The product of its digits is 145152, while the sum is 46.

The square root of 12928879 is about 3595.6750409346. The cubic root of 12928879 is about 234.7038914221.

The spelling of 12928879 in words is "twelve million, nine hundred twenty-eight thousand, eight hundred seventy-nine".