39979398013 has 4 divisors (see below), whose sum is σ = 40052487040. Its totient is φ = 39906308988.

The previous prime is 39979398007. The next prime is 39979398059. The reversal of 39979398013 is 31089397993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 39979398013 - 2¹⁷ = 39979266941 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 (39979398113) 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, 36543693 + ... + 36544786.

It is an arithmetic number, because the mean of its divisors is an integer number (10013121760).

Almost surely, 2^39979398013 is an apocalyptic number.

It is an amenable number.

39979398013 is a deficient number, since it is larger than the sum of its proper divisors (73089027).

39979398013 is an equidigital number, since it uses as much as digits as its factorization.

39979398013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73089026.

The product of its (nonzero) digits is 9920232, while the sum is 61.

The spelling of 39979398013 in words is "thirty-nine billion, nine hundred seventy-nine million, three hundred ninety-eight thousand, thirteen".