12799779 has 4 divisors (see below), whose sum is σ = 17066376. Its totient is φ = 8533184.

The previous prime is 12799769. The next prime is 12799781. The reversal of 12799779 is 97799721.

12799779 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 97799721 = 3 ⋅32599907.

It is a cyclic number.

It is not a de Polignac number, because 12799779 - 2⁴ = 12799763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12799729) 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, 2133294 + ... + 2133299.

It is an arithmetic number, because the mean of its divisors is an integer number (4266594).

Almost surely, 2^12799779 is an apocalyptic number.

12799779 is a deficient number, since it is larger than the sum of its proper divisors (4266597).

12799779 is an equidigital number, since it uses as much as digits as its factorization.

12799779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4266596.

The product of its digits is 500094, while the sum is 51.

The square root of 12799779 is about 3577.6778781774. The cubic root of 12799779 is about 233.9200727828.

The spelling of 12799779 in words is "twelve million, seven hundred ninety-nine thousand, seven hundred seventy-nine".