11982879691 has 2 divisors, whose sum is σ = 11982879692. Its totient is φ = 11982879690.

The previous prime is 11982879677. The next prime is 11982879731. The reversal of 11982879691 is 19697828911.

It is a weak prime.

It is an emirp because it is prime and its reverse (19697828911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11982879691 - 2²⁹ = 11446008779 is a prime.

It is not a weakly prime, because it can be changed into another prime (11982879631) 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 as a sum of consecutive naturals, namely, 5991439845 + 5991439846.

It is an arithmetic number, because the mean of its divisors is an integer number (5991439846).

Almost surely, 2^11982879691 is an apocalyptic number.

11982879691 is a deficient number, since it is larger than the sum of its proper divisors (1).

11982879691 is an equidigital number, since it uses as much as digits as its factorization.

11982879691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3919104, while the sum is 61.

The spelling of 11982879691 in words is "eleven billion, nine hundred eighty-two million, eight hundred seventy-nine thousand, six hundred ninety-one".