91813093 has 8 divisors (see below), whose sum is σ = 92631168. Its totient is φ = 90998544.

The previous prime is 91813087. The next prime is 91813121. The reversal of 91813093 is 39031819.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91813093 - 2²⁵ = 58258661 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 (91813193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83455 + ... + 84547.

It is an arithmetic number, because the mean of its divisors is an integer number (11578896).

Almost surely, 2^91813093 is an apocalyptic number.

It is an amenable number.

91813093 is a deficient number, since it is larger than the sum of its proper divisors (818075).

91813093 is a wasteful number, since it uses less digits than its factorization.

91813093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 91813093 is about 9581.9148921288. The cubic root of 91813093 is about 451.1298243271.

The spelling of 91813093 in words is "ninety-one million, eight hundred thirteen thousand, ninety-three".