91113845 has 4 divisors (see below), whose sum is σ = 109336620. Its totient is φ = 72891072.

The previous prime is 91113811. The next prime is 91113859. The reversal of 91113845 is 54831119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9229444 + 81884401 = 3038^2 + 9049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91113845 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9111380 + ... + 9111389.

It is an arithmetic number, because the mean of its divisors is an integer number (27334155).

Almost surely, 2^91113845 is an apocalyptic number.

It is an amenable number.

91113845 is a deficient number, since it is larger than the sum of its proper divisors (18222775).

91113845 is a wasteful number, since it uses less digits than its factorization.

91113845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18222774.

The product of its digits is 4320, while the sum is 32.

The square root of 91113845 is about 9545.3572484219. The cubic root of 91113845 is about 449.9816371108.

The spelling of 91113845 in words is "ninety-one million, one hundred thirteen thousand, eight hundred forty-five".