91882809 has 8 divisors (see below), whose sum is σ = 136122720. Its totient is φ = 61255188.

The previous prime is 91882801. The next prime is 91882811. The reversal of 91882809 is 90828819.

It is not a de Polignac number, because 91882809 - 2³ = 91882801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91882801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1701507 + ... + 1701560.

It is an arithmetic number, because the mean of its divisors is an integer number (17015340).

Almost surely, 2^91882809 is an apocalyptic number.

It is an amenable number.

91882809 is a deficient number, since it is larger than the sum of its proper divisors (44239911).

91882809 is a wasteful number, since it uses less digits than its factorization.

91882809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403076 (or 3403070 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 91882809 is about 9585.5520967756. The cubic root of 91882809 is about 451.2439801940.

The spelling of 91882809 in words is "ninety-one million, eight hundred eighty-two thousand, eight hundred nine".