12926697209 has 8 divisors (see below), whose sum is σ = 13148209800. Its totient is φ = 12705494400.

The previous prime is 12926697163. The next prime is 12926697211. The reversal of 12926697209 is 90279662921.

It can be written as a sum of positive squares in 4 ways, for example, as 888218809 + 12038478400 = 29803^2 + 109720^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12926697209 - 2¹² = 12926693113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12926697239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7517 + ... + 160965.

It is an arithmetic number, because the mean of its divisors is an integer number (1643526225).

Almost surely, 2^12926697209 is an apocalyptic number.

It is an amenable number.

12926697209 is a deficient number, since it is larger than the sum of its proper divisors (221512591).

12926697209 is a wasteful number, since it uses less digits than its factorization.

12926697209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154891.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The spelling of 12926697209 in words is "twelve billion, nine hundred twenty-six million, six hundred ninety-seven thousand, two hundred nine".