12808891 has 2 divisors, whose sum is σ = 12808892. Its totient is φ = 12808890.

The previous prime is 12808853. The next prime is 12808903. The reversal of 12808891 is 19880821.

12808891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12808891 - 2⁹ = 12808379 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12808891.

It is not a weakly prime, because it can be changed into another prime (12808801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6404445 + 6404446.

It is an arithmetic number, because the mean of its divisors is an integer number (6404446).

Almost surely, 2^12808891 is an apocalyptic number.

12808891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12808891 is an equidigital number, since it uses as much as digits as its factorization.

12808891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 12808891 is about 3578.9511033262. The cubic root of 12808891 is about 233.9755678584.

The spelling of 12808891 in words is "twelve million, eight hundred eight thousand, eight hundred ninety-one".