91798911 has 24 divisors (see below), whose sum is σ = 140449920. Its totient is φ = 57656016.

The previous prime is 91798909. The next prime is 91798939. The reversal of 91798911 is 11989719.

It is not a de Polignac number, because 91798911 - 2¹ = 91798909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91798901) 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 in 23 ways as a sum of consecutive naturals, for example, 10560 + ... + 17178.

It is an arithmetic number, because the mean of its divisors is an integer number (5852080).

Almost surely, 2^91798911 is an apocalyptic number.

91798911 is a deficient number, since it is larger than the sum of its proper divisors (48651009).

91798911 is a wasteful number, since it uses less digits than its factorization.

91798911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6715 (or 6712 counting only the distinct ones).

The product of its digits is 40824, while the sum is 45.

The square root of 91798911 is about 9581.1748235798. The cubic root of 91798911 is about 451.1065950599.

The spelling of 91798911 in words is "ninety-one million, seven hundred ninety-eight thousand, nine hundred eleven".