91873909189 has 8 divisors (see below), whose sum is σ = 92185404480. Its totient is φ = 91562517600.

The previous prime is 91873909163. The next prime is 91873909219. The reversal of 91873909189 is 98190937819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91873909189 - 2⁹ = 91873908677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91873909189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91873909789) 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 7 ways as a sum of consecutive naturals, for example, 2020474 + ... + 2065444.

It is an arithmetic number, because the mean of its divisors is an integer number (11523175560).

Almost surely, 2^91873909189 is an apocalyptic number.

It is an amenable number.

91873909189 is a deficient number, since it is larger than the sum of its proper divisors (311495291).

91873909189 is a wasteful number, since it uses less digits than its factorization.

91873909189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51851.

The product of its (nonzero) digits is 8817984, while the sum is 64.

The spelling of 91873909189 in words is "ninety-one billion, eight hundred seventy-three million, nine hundred nine thousand, one hundred eighty-nine".