12791779 has 24 divisors (see below), whose sum is σ = 17286912. Its totient is φ = 9191520.

The previous prime is 12791777. The next prime is 12791789. The reversal of 12791779 is 97719721.

It is not a de Polignac number, because 12791779 - 2¹ = 12791777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12791773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12522 + ... + 13504.

It is an arithmetic number, because the mean of its divisors is an integer number (720288).

Almost surely, 2^12791779 is an apocalyptic number.

12791779 is a deficient number, since it is larger than the sum of its proper divisors (4495133).

12791779 is a wasteful number, since it uses less digits than its factorization.

12791779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027 (or 1014 counting only the distinct ones).

The product of its digits is 55566, while the sum is 43.

The square root of 12791779 is about 3576.5596597848. The cubic root of 12791779 is about 233.8713284362.

The spelling of 12791779 in words is "twelve million, seven hundred ninety-one thousand, seven hundred seventy-nine".