12979939 has 4 divisors (see below), whose sum is σ = 14834224. Its totient is φ = 11125656.

The previous prime is 12979931. The next prime is 12979961. The reversal of 12979939 is 93997921.

12979939 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 12979939 - 2³ = 12979931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12979892 and 12979901.

It is not an unprimeable number, because it can be changed into a prime (12979931) 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, 927132 + ... + 927145.

It is an arithmetic number, because the mean of its divisors is an integer number (3708556).

Almost surely, 2^12979939 is an apocalyptic number.

12979939 is a deficient number, since it is larger than the sum of its proper divisors (1854285).

12979939 is an equidigital number, since it uses as much as digits as its factorization.

12979939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854284.

The product of its digits is 275562, while the sum is 49.

The square root of 12979939 is about 3602.7682412278. The cubic root of 12979939 is about 235.0124574655.

It can be divided in two parts, 1297 and 9939, that added together give a square (11236 = 106²).

The spelling of 12979939 in words is "twelve million, nine hundred seventy-nine thousand, nine hundred thirty-nine".