11979929807 has 4 divisors (see below), whose sum is σ = 12103434336. Its totient is φ = 11856425280.

The previous prime is 11979929789. The next prime is 11979929809. The reversal of 11979929807 is 70892997911.

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 11979929807 - 2¹⁶ = 11979864271 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 11979929807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979929809) 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, 61752119 + ... + 61752312.

It is an arithmetic number, because the mean of its divisors is an integer number (3025858584).

Almost surely, 2^11979929807 is an apocalyptic number.

11979929807 is a deficient number, since it is larger than the sum of its proper divisors (123504529).

11979929807 is an equidigital number, since it uses as much as digits as its factorization.

11979929807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123504528.

The product of its (nonzero) digits is 5143824, while the sum is 62.

The spelling of 11979929807 in words is "eleven billion, nine hundred seventy-nine million, nine hundred twenty-nine thousand, eight hundred seven".