12439243799 has 4 divisors (see below), whose sum is σ = 12840509760. Its totient is φ = 12037977840.

The previous prime is 12439243793. The next prime is 12439243811. The reversal of 12439243799 is 99734293421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12439243799 - 2⁸ = 12439243543 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 12439243799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12439243793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200632934 + ... + 200632995.

It is an arithmetic number, because the mean of its divisors is an integer number (3210127440).

Almost surely, 2^12439243799 is an apocalyptic number.

12439243799 is a deficient number, since it is larger than the sum of its proper divisors (401265961).

12439243799 is an equidigital number, since it uses as much as digits as its factorization.

12439243799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401265960.

The product of its digits is 2939328, while the sum is 53.

The spelling of 12439243799 in words is "twelve billion, four hundred thirty-nine million, two hundred forty-three thousand, seven hundred ninety-nine".