91085271 has 4 divisors (see below), whose sum is σ = 121447032. Its totient is φ = 60723512.

The previous prime is 91085263. The next prime is 91085273. The reversal of 91085271 is 17258019.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91085271 - 2³ = 91085263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91085273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15180876 + ... + 15180881.

It is an arithmetic number, because the mean of its divisors is an integer number (30361758).

Almost surely, 2^91085271 is an apocalyptic number.

91085271 is a deficient number, since it is larger than the sum of its proper divisors (30361761).

91085271 is a wasteful number, since it uses less digits than its factorization.

91085271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30361760.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 91085271 is about 9543.8603824658. The cubic root of 91085271 is about 449.9345929628.

The spelling of 91085271 in words is "ninety-one million, eighty-five thousand, two hundred seventy-one".