91071 has 8 divisors (see below), whose sum is σ = 134960. Its totient is φ = 60696.

The previous prime is 91033. The next prime is 91079. The reversal of 91071 is 17019.

It is not a de Polignac number, because 91071 - 2¹⁴ = 74687 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 (91079) 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, 1660 + ... + 1713.

It is an arithmetic number, because the mean of its divisors is an integer number (16870).

2⁹¹⁰⁷¹ is an apocalyptic number.

91071 is a deficient number, since it is larger than the sum of its proper divisors (43889).

91071 is a wasteful number, since it uses less digits than its factorization.

91071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382 (or 3376 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 18.

The square root of 91071 is about 301.7797209887. The cubic root of 91071 is about 44.9911093547.

The spelling of 91071 in words is "ninety-one thousand, seventy-one".