91612271 has 4 divisors (see below), whose sum is σ = 92772000. Its totient is φ = 90452544.

The previous prime is 91612267. The next prime is 91612273. The reversal of 91612271 is 17221619.

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 91612271 - 2² = 91612267 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91612273) 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 3 ways as a sum of consecutive naturals, for example, 579746 + ... + 579903.

It is an arithmetic number, because the mean of its divisors is an integer number (23193000).

Almost surely, 2^91612271 is an apocalyptic number.

91612271 is a deficient number, since it is larger than the sum of its proper divisors (1159729).

91612271 is a wasteful number, since it uses less digits than its factorization.

91612271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159728.

The product of its digits is 1512, while the sum is 29.

The square root of 91612271 is about 9571.4299349679. The cubic root of 91612271 is about 450.8006667423.

The spelling of 91612271 in words is "ninety-one million, six hundred twelve thousand, two hundred seventy-one".