12979139 has 2 divisors, whose sum is σ = 12979140. Its totient is φ = 12979138.

The previous prime is 12979129. The next prime is 12979151. The reversal of 12979139 is 93197921.

It is a weak prime.

It is an emirp because it is prime and its reverse (93197921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12979139 - 2⁴ = 12979123 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12979096 and 12979105.

It is not a weakly prime, because it can be changed into another prime (12979129) 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 as a sum of consecutive naturals, namely, 6489569 + 6489570.

It is an arithmetic number, because the mean of its divisors is an integer number (6489570).

Almost surely, 2^12979139 is an apocalyptic number.

12979139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12979139 is an equidigital number, since it uses as much as digits as its factorization.

12979139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 41.

The square root of 12979139 is about 3602.6572137799. The cubic root of 12979139 is about 235.0076291472.

It can be divided in two parts, 12979 and 139, that multiplied together give a palindrome (1804081).

The spelling of 12979139 in words is "twelve million, nine hundred seventy-nine thousand, one hundred thirty-nine".