91291113 has 12 divisors (see below), whose sum is σ = 134100720. Its totient is φ = 59828856.

The previous prime is 91291111. The next prime is 91291121. The reversal of 91291113 is 31119219.

It is not a de Polignac number, because 91291113 - 2¹ = 91291111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91291111) 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 11 ways as a sum of consecutive naturals, for example, 85431 + ... + 86492.

It is an arithmetic number, because the mean of its divisors is an integer number (11175060).

Almost surely, 2^91291113 is an apocalyptic number.

It is an amenable number.

91291113 is a deficient number, since it is larger than the sum of its proper divisors (42809607).

91291113 is a wasteful number, since it uses less digits than its factorization.

91291113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171988 (or 171985 counting only the distinct ones).

The product of its digits is 486, while the sum is 27.

The square root of 91291113 is about 9554.6382977065. The cubic root of 91291113 is about 450.2732710544.

The spelling of 91291113 in words is "ninety-one million, two hundred ninety-one thousand, one hundred thirteen".