91333089 has 20 divisors (see below), whose sum is σ = 136904724. Its totient is φ = 60679584.

The previous prime is 91333063. The next prime is 91333097. The reversal of 91333089 is 98033319.

It can be written as a sum of positive squares in 2 ways, for example, as 7884864 + 83448225 = 2808^2 + 9135^2 .

It is not a de Polignac number, because 91333089 - 2¹⁹ = 90808801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91333049) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 23899 + ... + 27455.

Almost surely, 2^91333089 is an apocalyptic number.

It is an amenable number.

91333089 is a deficient number, since it is larger than the sum of its proper divisors (45571635).

91333089 is a wasteful number, since it uses less digits than its factorization.

91333089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886 (or 3877 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 91333089 is about 9556.8346747236. The cubic root of 91333089 is about 450.3422729323.

The spelling of 91333089 in words is "ninety-one million, three hundred thirty-three thousand, eighty-nine".