12381938391 has 8 divisors (see below), whose sum is σ = 16511939200. Its totient is φ = 8253281592.

The previous prime is 12381938357. The next prime is 12381938407. The reversal of 12381938391 is 19383918321.

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

It is not a de Polignac number, because 12381938391 - 2¹⁰ = 12381937367 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12381938391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381938291) 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, 314305 + ... + 351498.

It is an arithmetic number, because the mean of its divisors is an integer number (2063992400).

Almost surely, 2^12381938391 is an apocalyptic number.

12381938391 is a deficient number, since it is larger than the sum of its proper divisors (4130000809).

12381938391 is an equidigital number, since it uses as much as digits as its factorization.

12381938391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672005.

The product of its digits is 279936, while the sum is 48.

The spelling of 12381938391 in words is "twelve billion, three hundred eighty-one million, nine hundred thirty-eight thousand, three hundred ninety-one".