12396038905 has 4 divisors (see below), whose sum is σ = 14875246692. Its totient is φ = 9916831120.

The previous prime is 12396038873. The next prime is 12396038929. The reversal of 12396038905 is 50983069321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50983069321 = 59 ⋅864119819.

It can be written as a sum of positive squares in 2 ways, for example, as 9177065209 + 3218973696 = 95797^2 + 56736^2 .

It is not a de Polignac number, because 12396038905 - 2⁵ = 12396038873 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1239603886 + ... + 1239603895.

It is an arithmetic number, because the mean of its divisors is an integer number (3718811673).

Almost surely, 2^12396038905 is an apocalyptic number.

It is an amenable number.

12396038905 is a deficient number, since it is larger than the sum of its proper divisors (2479207787).

12396038905 is an equidigital number, since it uses as much as digits as its factorization.

12396038905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479207786.

The product of its (nonzero) digits is 349920, while the sum is 46.

The spelling of 12396038905 in words is "twelve billion, three hundred ninety-six million, thirty-eight thousand, nine hundred five".