91055911 has 6 divisors (see below), whose sum is σ = 94304912. Its totient is φ = 87915240.

The previous prime is 91055863. The next prime is 91055917. The reversal of 91055911 is 11955019.

It is not a de Polignac number, because 91055911 - 2¹¹ = 91053863 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 (91055917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53295 + ... + 54976.

Almost surely, 2^91055911 is an apocalyptic number.

91055911 is a deficient number, since it is larger than the sum of its proper divisors (3249001).

91055911 is a wasteful number, since it uses less digits than its factorization.

91055911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108329 (or 108300 counting only the distinct ones).

The product of its (nonzero) digits is 2025, while the sum is 31.

The square root of 91055911 is about 9542.3220968483. The cubic root of 91055911 is about 449.8862444972.

The spelling of 91055911 in words is "ninety-one million, fifty-five thousand, nine hundred eleven".