85679789791 has 2 divisors, whose sum is σ = 85679789792. Its totient is φ = 85679789790.

The previous prime is 85679789749. The next prime is 85679789821. The reversal of 85679789791 is 19798797658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85679789791 - 2¹³ = 85679781599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85673789791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42839894895 + 42839894896.

It is an arithmetic number, because the mean of its divisors is an integer number (42839894896).

Almost surely, 2^85679789791 is an apocalyptic number.

85679789791 is a deficient number, since it is larger than the sum of its proper divisors (1).

85679789791 is an equidigital number, since it uses as much as digits as its factorization.

85679789791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480090240, while the sum is 76.

The spelling of 85679789791 in words is "eighty-five billion, six hundred seventy-nine million, seven hundred eighty-nine thousand, seven hundred ninety-one".