12775979 has 4 divisors (see below), whose sum is σ = 13216560. Its totient is φ = 12335400.

The previous prime is 12775951. The next prime is 12775981. The reversal of 12775979 is 97957721.

12775979 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.

It is a cyclic number.

It is not a de Polignac number, because 12775979 - 2¹² = 12771883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12777979) 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, 220247 + ... + 220304.

It is an arithmetic number, because the mean of its divisors is an integer number (3304140).

Almost surely, 2^12775979 is an apocalyptic number.

12775979 is a deficient number, since it is larger than the sum of its proper divisors (440581).

12775979 is an equidigital number, since it uses as much as digits as its factorization.

12775979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440580.

The product of its digits is 277830, while the sum is 47.

The square root of 12775979 is about 3574.3501507267. The cubic root of 12775979 is about 233.7749986133.

The spelling of 12775979 in words is "twelve million, seven hundred seventy-five thousand, nine hundred seventy-nine".