11131973867 has 4 divisors (see below), whose sum is σ = 12722255856. Its totient is φ = 9541691880.

The previous prime is 11131973789. The next prime is 11131973887. The reversal of 11131973867 is 76837913111.

It is a happy number.

11131973867 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76837913111 = 809 ⋅94978879.

It is not a de Polignac number, because 11131973867 - 2²⁰ = 11130925291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11131973887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795140984 + ... + 795140997.

It is an arithmetic number, because the mean of its divisors is an integer number (3180563964).

Almost surely, 2^11131973867 is an apocalyptic number.

11131973867 is a deficient number, since it is larger than the sum of its proper divisors (1590281989).

11131973867 is an equidigital number, since it uses as much as digits as its factorization.

11131973867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590281988.

The product of its digits is 190512, while the sum is 47.

The spelling of 11131973867 in words is "eleven billion, one hundred thirty-one million, nine hundred seventy-three thousand, eight hundred sixty-seven".