91788892471 has 2 divisors, whose sum is σ = 91788892472. Its totient is φ = 91788892470.

The previous prime is 91788892469. The next prime is 91788892483. The reversal of 91788892471 is 17429888719.

It is a weak prime.

It is an emirp because it is prime and its reverse (17429888719) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91788892471 - 2¹ = 91788892469 is a prime.

It is a super-3 number, since 3×91788892471³ (a number of 34 digits) contains 333 as substring.

Together with 91788892469, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91788892271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45894446235 + 45894446236.

It is an arithmetic number, because the mean of its divisors is an integer number (45894446236).

Almost surely, 2^91788892471 is an apocalyptic number.

91788892471 is a deficient number, since it is larger than the sum of its proper divisors (1).

91788892471 is an equidigital number, since it uses as much as digits as its factorization.

91788892471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16257024, while the sum is 64.

The spelling of 91788892471 in words is "ninety-one billion, seven hundred eighty-eight million, eight hundred ninety-two thousand, four hundred seventy-one".