12779049 has 4 divisors (see below), whose sum is σ = 17038736. Its totient is φ = 8519364.

The previous prime is 12779047. The next prime is 12779059. The reversal of 12779049 is 94097721.

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.

It is not a de Polignac number, because 12779049 - 2¹ = 12779047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12778998 and 12779016.

It is not an unprimeable number, because it can be changed into a prime (12779047) 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, 2129839 + ... + 2129844.

It is an arithmetic number, because the mean of its divisors is an integer number (4259684).

Almost surely, 2^12779049 is an apocalyptic number.

It is an amenable number.

12779049 is a deficient number, since it is larger than the sum of its proper divisors (4259687).

12779049 is an equidigital number, since it uses as much as digits as its factorization.

12779049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259686.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 12779049 is about 3574.7795736241. The cubic root of 12779049 is about 233.7937220778.

The spelling of 12779049 in words is "twelve million, seven hundred seventy-nine thousand, forty-nine".