12397689925 has 6 divisors (see below), whose sum is σ = 15373135538. Its totient is φ = 9918151920.

The previous prime is 12397689923. The next prime is 12397689947. The reversal of 12397689925 is 52998679321.

It can be written as a sum of positive squares in 3 ways, for example, as 78021889 + 12319668036 = 8833^2 + 110994^2 .

It is not a de Polignac number, because 12397689925 - 2¹ = 12397689923 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397689923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 247953774 + ... + 247953823.

Almost surely, 2^12397689925 is an apocalyptic number.

It is an amenable number.

12397689925 is a deficient number, since it is larger than the sum of its proper divisors (2975445613).

12397689925 is an equidigital number, since it uses as much as digits as its factorization.

12397689925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495907607 (or 495907602 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 61.

The spelling of 12397689925 in words is "twelve billion, three hundred ninety-seven million, six hundred eighty-nine thousand, nine hundred twenty-five".