12892901809 has 4 divisors (see below), whose sum is σ = 13337484660. Its totient is φ = 12448318960.

The previous prime is 12892901803. The next prime is 12892901863. The reversal of 12892901809 is 90810929821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3309470784 + 9583431025 = 57528^2 + 97895^2 .

It is a cyclic number.

It is not a de Polignac number, because 12892901809 - 2²⁵ = 12859347377 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12892901803) 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 3 ways as a sum of consecutive naturals, for example, 222291382 + ... + 222291439.

It is an arithmetic number, because the mean of its divisors is an integer number (3334371165).

Almost surely, 2^12892901809 is an apocalyptic number.

It is an amenable number.

12892901809 is a deficient number, since it is larger than the sum of its proper divisors (444582851).

12892901809 is an equidigital number, since it uses as much as digits as its factorization.

12892901809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444582850.

The product of its (nonzero) digits is 186624, while the sum is 49.

The spelling of 12892901809 in words is "twelve billion, eight hundred ninety-two million, nine hundred one thousand, eight hundred nine".