91030113 has 12 divisors (see below), whose sum is σ = 137205120. Its totient is φ = 58048056.

The previous prime is 91030111. The next prime is 91030123. The reversal of 91030113 is 31103019.

It is not a de Polignac number, because 91030113 - 2¹ = 91030111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91030111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219673 + ... + 220086.

It is an arithmetic number, because the mean of its divisors is an integer number (11433760).

Almost surely, 2^91030113 is an apocalyptic number.

It is an amenable number.

91030113 is a deficient number, since it is larger than the sum of its proper divisors (46175007).

91030113 is a wasteful number, since it uses less digits than its factorization.

91030113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439788 (or 439785 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 91030113 is about 9540.9702336817. The cubic root of 91030113 is about 449.8437531624.

The spelling of 91030113 in words is "ninety-one million, thirty thousand, one hundred thirteen".