12005508979 has 2 divisors, whose sum is σ = 12005508980. Its totient is φ = 12005508978.

The previous prime is 12005508959. The next prime is 12005509007. The reversal of 12005508979 is 97980550021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12005508979 - 2¹⁷ = 12005377907 is a prime.

It is not a weakly prime, because it can be changed into another prime (12005508959) 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, 6002754489 + 6002754490.

It is an arithmetic number, because the mean of its divisors is an integer number (6002754490).

Almost surely, 2^12005508979 is an apocalyptic number.

12005508979 is a deficient number, since it is larger than the sum of its proper divisors (1).

12005508979 is an equidigital number, since it uses as much as digits as its factorization.

12005508979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 12005508979 in words is "twelve billion, five million, five hundred eight thousand, nine hundred seventy-nine".