91110013 has 4 divisors (see below), whose sum is σ = 92207808. Its totient is φ = 90012220.

The previous prime is 91110001. The next prime is 91110029. The reversal of 91110013 is 31001119.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 91110013 - 2⁵ = 91109981 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 (91110043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548773 + ... + 548938.

It is an arithmetic number, because the mean of its divisors is an integer number (23051952).

Almost surely, 2^91110013 is an apocalyptic number.

It is an amenable number.

91110013 is a deficient number, since it is larger than the sum of its proper divisors (1097795).

91110013 is a wasteful number, since it uses less digits than its factorization.

91110013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097794.

The product of its (nonzero) digits is 27, while the sum is 16.

The square root of 91110013 is about 9545.1565204558. The cubic root of 91110013 is about 449.9753286886.

The spelling of 91110013 in words is "ninety-one million, one hundred ten thousand, thirteen".