12879791 has 4 divisors (see below), whose sum is σ = 12893952. Its totient is φ = 12865632.

The previous prime is 12879773. The next prime is 12879827. The reversal of 12879791 is 19797821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19797821 = 757 ⋅26153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12879791 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 (12879721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5615 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (3223488).

Almost surely, 2^12879791 is an apocalyptic number.

12879791 is a deficient number, since it is larger than the sum of its proper divisors (14161).

12879791 is an equidigital number, since it uses as much as digits as its factorization.

12879791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14160.

The product of its digits is 63504, while the sum is 44.

The square root of 12879791 is about 3588.8425710805. The cubic root of 12879791 is about 234.4064756779.

The spelling of 12879791 in words is "twelve million, eight hundred seventy-nine thousand, seven hundred ninety-one".