91093812 has 24 divisors (see below), whose sum is σ = 212817696. Its totient is φ = 30326688.

The previous prime is 91093811. The next prime is 91093829. The reversal of 91093812 is 21839019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91093811) 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 7 ways as a sum of consecutive naturals, for example, 6298 + ... + 14894.

It is an arithmetic number, because the mean of its divisors is an integer number (8867404).

Almost surely, 2^91093812 is an apocalyptic number.

It is an amenable number.

91093812 is an abundant number, since it is smaller than the sum of its proper divisors (121723884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91093812 is a wasteful number, since it uses less digits than its factorization.

91093812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9487 (or 9485 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 91093812 is about 9544.3078324203. The cubic root of 91093812 is about 449.9486558704.

It can be divided in two parts, 9109 and 3812, that added together give a palindrome (12921).

The spelling of 91093812 in words is "ninety-one million, ninety-three thousand, eight hundred twelve".