12898009 has 4 divisors (see below), whose sum is σ = 13458816. Its totient is φ = 12337204.

The previous prime is 12898007. The next prime is 12898013. The reversal of 12898009 is 90089821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12898009 - 2¹ = 12898007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12898007) 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, 280369 + ... + 280414.

It is an arithmetic number, because the mean of its divisors is an integer number (3364704).

Almost surely, 2^12898009 is an apocalyptic number.

It is an amenable number.

12898009 is a deficient number, since it is larger than the sum of its proper divisors (560807).

12898009 is an equidigital number, since it uses as much as digits as its factorization.

12898009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560806.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 12898009 is about 3591.3798183985. The cubic root of 12898009 is about 234.5169434462.

The spelling of 12898009 in words is "twelve million, eight hundred ninety-eight thousand, nine".