79995117121939 has 2 divisors, whose sum is σ = 79995117121940. Its totient is φ = 79995117121938.

The previous prime is 79995117121849. The next prime is 79995117121963. The reversal of 79995117121939 is 93912171159997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79995117121939 - 2²¹ = 79995115024787 is a prime.

It is not a weakly prime, because it can be changed into another prime (79995157121939) 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 as a sum of consecutive naturals, namely, 39997558560969 + 39997558560970.

It is an arithmetic number, because the mean of its divisors is an integer number (39997558560970).

Almost surely, 2^{79995117121939} is an apocalyptic number.

79995117121939 is a deficient number, since it is larger than the sum of its proper divisors (1).

79995117121939 is an equidigital number, since it uses as much as digits as its factorization.

79995117121939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86802030, while the sum is 73.

The spelling of 79995117121939 in words is "seventy-nine trillion, nine hundred ninety-five billion, one hundred seventeen million, one hundred twenty-one thousand, nine hundred thirty-nine".