91358085 has 128 divisors (see below), whose sum is σ = 198180864. Its totient is φ = 34836480.

The previous prime is 91358081. The next prime is 91358087. The reversal of 91358085 is 58085319.

It is not a de Polignac number, because 91358085 - 2² = 91358081 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91358081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 719292 + ... + 719418.

It is an arithmetic number, because the mean of its divisors is an integer number (1548288).

Almost surely, 2^91358085 is an apocalyptic number.

It is an amenable number.

91358085 is an abundant number, since it is smaller than the sum of its proper divisors (106822779).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91358085 is a wasteful number, since it uses less digits than its factorization.

91358085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203.

The product of its (nonzero) digits is 43200, while the sum is 39.

The square root of 91358085 is about 9558.1423404341. The cubic root of 91358085 is about 450.3833523440.

The spelling of 91358085 in words is "ninety-one million, three hundred fifty-eight thousand, eighty-five".