12879769 has 4 divisors (see below), whose sum is σ = 14719744. Its totient is φ = 11039796.

The previous prime is 12879749. The next prime is 12879773. The reversal of 12879769 is 96797821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96797821 = 9749 ⋅9929.

It is a cyclic number.

It is not a de Polignac number, because 12879769 - 2⁹ = 12879257 is a prime.

It is a super-2 number, since 2×12879769² = 331776898986722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12879749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919977 + ... + 919990.

It is an arithmetic number, because the mean of its divisors is an integer number (3679936).

Almost surely, 2^12879769 is an apocalyptic number.

It is an amenable number.

12879769 is a deficient number, since it is larger than the sum of its proper divisors (1839975).

12879769 is an equidigital number, since it uses as much as digits as its factorization.

12879769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839974.

The product of its digits is 381024, while the sum is 49.

The square root of 12879769 is about 3588.8395060242. The cubic root of 12879769 is about 234.4063422144.

It can be divided in two parts, 128 and 79769, that added together give a palindrome (79897).

The spelling of 12879769 in words is "twelve million, eight hundred seventy-nine thousand, seven hundred sixty-nine".