91017 has 8 divisors (see below), whose sum is σ = 134880. Its totient is φ = 60660.

The previous prime is 91009. The next prime is 91019. The reversal of 91017 is 71019.

It is not a de Polignac number, because 91017 - 2³ = 91009 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 91017.

It is not an unprimeable number, because it can be changed into a prime (91019) 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, 1659 + ... + 1712.

It is an arithmetic number, because the mean of its divisors is an integer number (16860).

2⁹¹⁰¹⁷ is an apocalyptic number.

It is an amenable number.

91017 is a deficient number, since it is larger than the sum of its proper divisors (43863).

91017 is a wasteful number, since it uses less digits than its factorization.

91017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380 (or 3374 counting only the distinct ones).

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

The square root of 91017 is about 301.6902384897. The cubic root of 91017 is about 44.9822151943.

The spelling of 91017 in words is "ninety-one thousand, seventeen".