11982879731 has 2 divisors, whose sum is σ = 11982879732. Its totient is φ = 11982879730.

The previous prime is 11982879691. The next prime is 11982879749. The reversal of 11982879731 is 13797828911.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (13797828911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11982879731 is a prime.

It is a super-2 number, since 2×11982879731² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11982879781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5991439865 + 5991439866.

It is an arithmetic number, because the mean of its divisors is an integer number (5991439866).

Almost surely, 2^11982879731 is an apocalyptic number.

11982879731 is a deficient number, since it is larger than the sum of its proper divisors (1).

11982879731 is an equidigital number, since it uses as much as digits as its factorization.

11982879731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1524096, while the sum is 56.

The spelling of 11982879731 in words is "eleven billion, nine hundred eighty-two million, eight hundred seventy-nine thousand, seven hundred thirty-one".