91909595471 has 2 divisors, whose sum is σ = 91909595472. Its totient is φ = 91909595470.

The previous prime is 91909595443. The next prime is 91909595473. The reversal of 91909595471 is 17459590919.

It is a strong prime.

It is an emirp because it is prime and its reverse (17459590919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91909595471 - 2²⁶ = 91842486607 is a prime.

It is a super-3 number, since 3×91909595471³ (a number of 34 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 91909595473, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91909595471.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91909595473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45954797735 + 45954797736.

It is an arithmetic number, because the mean of its divisors is an integer number (45954797736).

Almost surely, 2^91909595471 is an apocalyptic number.

91909595471 is a deficient number, since it is larger than the sum of its proper divisors (1).

91909595471 is an equidigital number, since it uses as much as digits as its factorization.

91909595471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4592700, while the sum is 59.

The spelling of 91909595471 in words is "ninety-one billion, nine hundred nine million, five hundred ninety-five thousand, four hundred seventy-one".