1311999577979 has 2 divisors, whose sum is σ = 1311999577980. Its totient is φ = 1311999577978.

The previous prime is 1311999577957. The next prime is 1311999577991. The reversal of 1311999577979 is 9797759991131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311999577979 - 2²⁰ = 1311998529403 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311999577909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655999788989 + 655999788990.

It is an arithmetic number, because the mean of its divisors is an integer number (655999788990).

Almost surely, 2^{1311999577979} is an apocalyptic number.

1311999577979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311999577979 is an equidigital number, since it uses as much as digits as its factorization.

1311999577979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 303807105, while the sum is 77.

The spelling of 1311999577979 in words is "one trillion, three hundred eleven billion, nine hundred ninety-nine million, five hundred seventy-seven thousand, nine hundred seventy-nine".