12397838031 has 6 divisors (see below), whose sum is σ = 17907988280. Its totient is φ = 8265225348.

The previous prime is 12397838023. The next prime is 12397838059. The reversal of 12397838031 is 13083879321.

It is a happy number.

12397838031 is a `hidden beast` number, since 1 + 239 + 7 + 8 + 380 + 31 = 666.

It is not a de Polignac number, because 12397838031 - 2³ = 12397838023 is a prime.

It is a super-2 number, since 2×12397838031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397838231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 688768771 + ... + 688768788.

Almost surely, 2^12397838031 is an apocalyptic number.

12397838031 is a deficient number, since it is larger than the sum of its proper divisors (5510150249).

12397838031 is a wasteful number, since it uses less digits than its factorization.

12397838031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377537565 (or 1377537562 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 12397838031 in words is "twelve billion, three hundred ninety-seven million, eight hundred thirty-eight thousand, thirty-one".