91118093 has 4 divisors (see below), whose sum is σ = 99401568. Its totient is φ = 82834620.

The previous prime is 91118009. The next prime is 91118099. The reversal of 91118093 is 39081119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91118093 - 2¹⁸ = 90855949 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 (91118099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4141721 + ... + 4141742.

It is an arithmetic number, because the mean of its divisors is an integer number (24850392).

Almost surely, 2^91118093 is an apocalyptic number.

It is an amenable number.

91118093 is a deficient number, since it is larger than the sum of its proper divisors (8283475).

91118093 is a wasteful number, since it uses less digits than its factorization.

91118093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8283474.

The product of its (nonzero) digits is 1944, while the sum is 32.

The square root of 91118093 is about 9545.5797623822. The cubic root of 91118093 is about 449.9886301654.

The spelling of 91118093 in words is "ninety-one million, one hundred eighteen thousand, ninety-three".