12906813 has 16 divisors (see below), whose sum is σ = 17620160. Its totient is φ = 8401536.

The previous prime is 12906793. The next prime is 12906823. The reversal of 12906813 is 31860921.

12906813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12906813 - 2¹² = 12902717 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 (12906823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31353 + ... + 31761.

It is an arithmetic number, because the mean of its divisors is an integer number (1101260).

Almost surely, 2^12906813 is an apocalyptic number.

It is an amenable number.

12906813 is a deficient number, since it is larger than the sum of its proper divisors (4713347).

12906813 is a wasteful number, since it uses less digits than its factorization.

12906813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 12906813 is about 3592.6053220469. The cubic root of 12906813 is about 234.5702906353.

The spelling of 12906813 in words is "twelve million, nine hundred six thousand, eight hundred thirteen".