11977182979 has 4 divisors (see below), whose sum is σ = 11987571976. Its totient is φ = 11966793984.

The previous prime is 11977182967. The next prime is 11977182989. The reversal of 11977182979 is 97928177911.

11977182979 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.

It is a cyclic number.

It is not a de Polignac number, because 11977182979 - 2¹⁹ = 11976658691 is a prime.

It is a super-2 number, since 2×11977182979² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11977182949) 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, 5192769 + ... + 5195074.

It is an arithmetic number, because the mean of its divisors is an integer number (2996892994).

Almost surely, 2^11977182979 is an apocalyptic number.

11977182979 is a deficient number, since it is larger than the sum of its proper divisors (10388997).

11977182979 is a wasteful number, since it uses less digits than its factorization.

11977182979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10388996.

The product of its digits is 4000752, while the sum is 61.

The spelling of 11977182979 in words is "eleven billion, nine hundred seventy-seven million, one hundred eighty-two thousand, nine hundred seventy-nine".