91216118 has 16 divisors (see below), whose sum is σ = 165569184. Its totient is φ = 36792960.

The previous prime is 91216117. The next prime is 91216121. The reversal of 91216118 is 81161219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91216117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191393 + ... + 191868.

It is an arithmetic number, because the mean of its divisors is an integer number (10348074).

Almost surely, 2^91216118 is an apocalyptic number.

91216118 is a deficient number, since it is larger than the sum of its proper divisors (74353066).

91216118 is a wasteful number, since it uses less digits than its factorization.

91216118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383287.

The product of its digits is 864, while the sum is 29.

The square root of 91216118 is about 9550.7129576802. The cubic root of 91216118 is about 450.1499385128.

The spelling of 91216118 in words is "ninety-one million, two hundred sixteen thousand, one hundred eighteen".