91707943717 has 4 divisors (see below), whose sum is σ = 98762400940. Its totient is φ = 84653486496.

The previous prime is 91707943703. The next prime is 91707943727. The reversal of 91707943717 is 71734970719.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51932028996 + 39775914721 = 227886^2 + 199439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91707943717 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 (91707943727) 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, 3527228592 + ... + 3527228617.

It is an arithmetic number, because the mean of its divisors is an integer number (24690600235).

Almost surely, 2^91707943717 is an apocalyptic number.

It is an amenable number.

91707943717 is a deficient number, since it is larger than the sum of its proper divisors (7054457223).

91707943717 is a wasteful number, since it uses less digits than its factorization.

91707943717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054457222.

The product of its (nonzero) digits is 2333772, while the sum is 55.

The spelling of 91707943717 in words is "ninety-one billion, seven hundred seven million, nine hundred forty-three thousand, seven hundred seventeen".