91290115 has 32 divisors (see below), whose sum is σ = 132036480. Its totient is φ = 59265024.

The previous prime is 91290107. The next prime is 91290127. The reversal of 91290115 is 51109219.

It is not a de Polignac number, because 91290115 - 2³ = 91290107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52947 + ... + 54643.

It is an arithmetic number, because the mean of its divisors is an integer number (4126140).

Almost surely, 2^91290115 is an apocalyptic number.

91290115 is a deficient number, since it is larger than the sum of its proper divisors (40746365).

91290115 is a wasteful number, since it uses less digits than its factorization.

91290115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 91290115 is about 9554.5860716203. The cubic root of 91290115 is about 450.2716302435.

The spelling of 91290115 in words is "ninety-one million, two hundred ninety thousand, one hundred fifteen".