12779791 has 4 divisors (see below), whose sum is σ = 12790800. Its totient is φ = 12768784.

The previous prime is 12779783. The next prime is 12779821. The reversal of 12779791 is 19797721.

12779791 is digitally balanced in base 3, 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 19797721 = 373 ⋅53077.

It is a cyclic number.

It is not a de Polignac number, because 12779791 - 2³ = 12779783 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 (12773791) 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, 3526 + ... + 6163.

It is an arithmetic number, because the mean of its divisors is an integer number (3197700).

Almost surely, 2^12779791 is an apocalyptic number.

12779791 is a deficient number, since it is larger than the sum of its proper divisors (11009).

12779791 is an equidigital number, since it uses as much as digits as its factorization.

12779791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11008.

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

The square root of 12779791 is about 3574.8833547404. The cubic root of 12779791 is about 233.7982469733.

The spelling of 12779791 in words is "twelve million, seven hundred seventy-nine thousand, seven hundred ninety-one".