91010000097 has 12 divisors (see below), whose sum is σ = 131468948260. Its totient is φ = 60668690688.

The previous prime is 91010000093. The next prime is 91010000111. The reversal of 91010000097 is 79000001019.

It can be written as a sum of positive squares in 2 ways, for example, as 12786860241 + 78223139856 = 113079^2 + 279684^2 .

It is not a de Polignac number, because 91010000097 - 2² = 91010000093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91010000097.

It is not an unprimeable number, because it can be changed into a prime (91010000093) 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 11 ways as a sum of consecutive naturals, for example, 260572 + ... + 499917.

Almost surely, 2^91010000097 is an apocalyptic number.

It is an amenable number.

91010000097 is a deficient number, since it is larger than the sum of its proper divisors (40458948163).

91010000097 is a wasteful number, since it uses less digits than its factorization.

91010000097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773792 (or 773789 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The spelling of 91010000097 in words is "ninety-one billion, ten million, ninety-seven", and thus it is an aban number and an uban number.