79856965927 has 2 divisors, whose sum is σ = 79856965928. Its totient is φ = 79856965926.

The previous prime is 79856965897. The next prime is 79856965973. The reversal of 79856965927 is 72956965897.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79856965927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79856965927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79856965987) 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, 39928482963 + 39928482964.

It is an arithmetic number, because the mean of its divisors is an integer number (39928482964).

Almost surely, 2^79856965927 is an apocalyptic number.

79856965927 is a deficient number, since it is larger than the sum of its proper divisors (1).

79856965927 is an equidigital number, since it uses as much as digits as its factorization.

79856965927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 514382400, while the sum is 73.

The spelling of 79856965927 in words is "seventy-nine billion, eight hundred fifty-six million, nine hundred sixty-five thousand, nine hundred twenty-seven".