12896809 has 2 divisors, whose sum is σ = 12896810. Its totient is φ = 12896808.

The previous prime is 12896797. The next prime is 12896827. The reversal of 12896809 is 90869821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6786025 + 6110784 = 2605^2 + 2472^2 .

It is a cyclic number.

It is not a de Polignac number, because 12896809 - 2²³ = 4508201 is a prime.

It is not a weakly prime, because it can be changed into another prime (12896209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6448404 + 6448405.

It is an arithmetic number, because the mean of its divisors is an integer number (6448405).

Almost surely, 2^12896809 is an apocalyptic number.

It is an amenable number.

12896809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12896809 is an equidigital number, since it uses as much as digits as its factorization.

12896809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 12896809 is about 3591.2127478054. The cubic root of 12896809 is about 234.5096702550.

The spelling of 12896809 in words is "twelve million, eight hundred ninety-six thousand, eight hundred nine".