12979813 has 16 divisors (see below), whose sum is σ = 16352640. Its totient is φ = 10008000.

The previous prime is 12979801. The next prime is 12979819. The reversal of 12979813 is 31897921.

12979813 is nontrivially palindromic in base 13.

It is a cyclic number.

It is not a de Polignac number, because 12979813 - 2⁹ = 12979301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12979819) 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 in 15 ways as a sum of consecutive naturals, for example, 6943 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (1022040).

Almost surely, 2^12979813 is an apocalyptic number.

It is an amenable number.

12979813 is a deficient number, since it is larger than the sum of its proper divisors (3372827).

12979813 is a wasteful number, since it uses less digits than its factorization.

12979813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788.

The product of its digits is 27216, while the sum is 40.

The square root of 12979813 is about 3602.7507546318. The cubic root of 12979813 is about 235.0116970185.

The spelling of 12979813 in words is "twelve million, nine hundred seventy-nine thousand, eight hundred thirteen".