91144118 has 8 divisors (see below), whose sum is σ = 147232848. Its totient is φ = 42066504.

The previous prime is 91144111. The next prime is 91144169. The reversal of 91144118 is 81144119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91144111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1752746 + ... + 1752797.

It is an arithmetic number, because the mean of its divisors is an integer number (18404106).

Almost surely, 2^91144118 is an apocalyptic number.

91144118 is a deficient number, since it is larger than the sum of its proper divisors (56088730).

91144118 is a wasteful number, since it uses less digits than its factorization.

91144118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3505558.

The product of its digits is 1152, while the sum is 29.

The square root of 91144118 is about 9546.9428614609. The cubic root of 91144118 is about 450.0314677583.

Subtracting from 91144118 its reverse (81144119), we obtain a palindrome (9999999).

The spelling of 91144118 in words is "ninety-one million, one hundred forty-four thousand, one hundred eighteen".