91883570717 has 2 divisors, whose sum is σ = 91883570718. Its totient is φ = 91883570716.

The previous prime is 91883570629. The next prime is 91883570731. The reversal of 91883570717 is 71707538819.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91535897401 + 347673316 = 302549^2 + 18646^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91883570717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91883570747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45941785358 + 45941785359.

It is an arithmetic number, because the mean of its divisors is an integer number (45941785359).

Almost surely, 2^91883570717 is an apocalyptic number.

It is an amenable number.

91883570717 is a deficient number, since it is larger than the sum of its proper divisors (1).

91883570717 is an equidigital number, since it uses as much as digits as its factorization.

91883570717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 56.

The spelling of 91883570717 in words is "ninety-one billion, eight hundred eighty-three million, five hundred seventy thousand, seven hundred seventeen".