91799405173 has 32 divisors (see below), whose sum is σ = 106899701760. Its totient is φ = 77209778880.

The previous prime is 91799405167. The next prime is 91799405177. The reversal of 91799405173 is 37150499719.

It is a cyclic number.

It is not a de Polignac number, because 91799405173 - 2²⁹ = 91262534261 is a prime.

It is a super-3 number, since 3×91799405173³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91799405177) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77729643 + ... + 77730823.

It is an arithmetic number, because the mean of its divisors is an integer number (3340615680).

Almost surely, 2^91799405173 is an apocalyptic number.

It is an amenable number.

91799405173 is a deficient number, since it is larger than the sum of its proper divisors (15100296587).

91799405173 is a wasteful number, since it uses less digits than its factorization.

91799405173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017.

The product of its (nonzero) digits is 2143260, while the sum is 55.

The spelling of 91799405173 in words is "ninety-one billion, seven hundred ninety-nine million, four hundred five thousand, one hundred seventy-three".