91730323491 has 8 divisors (see below), whose sum is σ = 125151449280. Its totient is φ = 59731373352.

The previous prime is 91730323471. The next prime is 91730323507. The reversal of 91730323491 is 19432303719.

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

It is not a de Polignac number, because 91730323491 - 2⁹ = 91730322979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91730323411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355543761 + ... + 355544018.

It is an arithmetic number, because the mean of its divisors is an integer number (15643931160).

Almost surely, 2^91730323491 is an apocalyptic number.

91730323491 is a deficient number, since it is larger than the sum of its proper divisors (33421125789).

91730323491 is a wasteful number, since it uses less digits than its factorization.

91730323491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711087825.

The product of its (nonzero) digits is 122472, while the sum is 42.

The spelling of 91730323491 in words is "ninety-one billion, seven hundred thirty million, three hundred twenty-three thousand, four hundred ninety-one".