91679803789 has 16 divisors (see below), whose sum is σ = 110698516480. Its totient is φ = 74172017520.

The previous prime is 91679803771. The next prime is 91679803801. The reversal of 91679803789 is 98730897619.

It is a cyclic number.

It is not a de Polignac number, because 91679803789 - 2⁵ = 91679803757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91679803769) 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 in 15 ways as a sum of consecutive naturals, for example, 1235769 + ... + 1307854.

It is an arithmetic number, because the mean of its divisors is an integer number (6918657280).

Almost surely, 2^91679803789 is an apocalyptic number.

It is an amenable number.

91679803789 is a deficient number, since it is larger than the sum of its proper divisors (19018712691).

91679803789 is a wasteful number, since it uses less digits than its factorization.

91679803789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543920.

The product of its (nonzero) digits is 41150592, while the sum is 67.

The spelling of 91679803789 in words is "ninety-one billion, six hundred seventy-nine million, eight hundred three thousand, seven hundred eighty-nine".