91108899 has 48 divisors (see below), whose sum is σ = 161074368. Its totient is φ = 48439296.

The previous prime is 91108861. The next prime is 91108943. The reversal of 91108899 is 99880119.

It is not a de Polignac number, because 91108899 - 2¹⁶ = 91043363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91108399) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103449 + ... + 104325.

It is an arithmetic number, because the mean of its divisors is an integer number (3355716).

Almost surely, 2^91108899 is an apocalyptic number.

91108899 is a deficient number, since it is larger than the sum of its proper divisors (69965469).

91108899 is a wasteful number, since it uses less digits than its factorization.

91108899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 91108899 is about 9545.0981660746. The cubic root of 91108899 is about 449.9734947352.

The spelling of 91108899 in words is "ninety-one million, one hundred eight thousand, eight hundred ninety-nine".