91100093 has 16 divisors (see below), whose sum is σ = 110753280. Its totient is φ = 73149696.

The previous prime is 91100083. The next prime is 91100099. The reversal of 91100093 is 39000119.

It is a cyclic number.

It is not a de Polignac number, because 91100093 - 2¹⁴ = 91083709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91100099) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25580 + ... + 28922.

It is an arithmetic number, because the mean of its divisors is an integer number (6922080).

Almost surely, 2^91100093 is an apocalyptic number.

It is an amenable number.

91100093 is a deficient number, since it is larger than the sum of its proper divisors (19653187).

91100093 is a wasteful number, since it uses less digits than its factorization.

91100093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3596.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 91100093 is about 9544.6368710391. The cubic root of 91100093 is about 449.9589970871.

The spelling of 91100093 in words is "ninety-one million, one hundred thousand, ninety-three".