11972878839 has 30 divisors (see below), whose sum is σ = 18523522160. Its totient is φ = 7706636784.

The previous prime is 11972878837. The next prime is 11972878843. The reversal of 11972878839 is 93887827911.

It is not a de Polignac number, because 11972878839 - 2¹ = 11972878837 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 (11972878831) by changing a digit.

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 29 ways as a sum of consecutive naturals, for example, 19759 + ... + 156000.

Almost surely, 2^11972878839 is an apocalyptic number.

11972878839 is a deficient number, since it is larger than the sum of its proper divisors (6550643321).

11972878839 is an equidigital number, since it uses as much as digits as its factorization.

11972878839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175829 (or 175791 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 63.

The spelling of 11972878839 in words is "eleven billion, nine hundred seventy-two million, eight hundred seventy-eight thousand, eight hundred thirty-nine".