91000017 has 20 divisors (see below), whose sum is σ = 136289076. Its totient is φ = 60510240.

The previous prime is 91000009. The next prime is 91000027. The reversal of 91000017 is 71000019.

It can be written as a sum of positive squares in 2 ways, for example, as 61449921 + 29550096 = 7839^2 + 5436^2 .

It is not a de Polignac number, because 91000017 - 2³ = 91000009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36123 + ... + 38559.

Almost surely, 2^91000017 is an apocalyptic number.

It is an amenable number.

91000017 is a deficient number, since it is larger than the sum of its proper divisors (45289059).

91000017 is a wasteful number, since it uses less digits than its factorization.

91000017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2910 (or 2901 counting only the distinct ones).

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

The square root of 91000017 is about 9539.3929052115. The cubic root of 91000017 is about 449.7941725367.

The spelling of 91000017 in words is "ninety-one million, seventeen", and thus it is an aban number and an uban number.