91093869 has 24 divisors (see below), whose sum is σ = 141190080. Its totient is φ = 57937176.

The previous prime is 91093867. The next prime is 91093879. The reversal of 91093869 is 96839019.

It is not a de Polignac number, because 91093869 - 2¹ = 91093867 is a prime.

It is a super-2 number, since 2×91093869² = 16596185938778322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91093867) 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 23 ways as a sum of consecutive naturals, for example, 237652 + ... + 238034.

It is an arithmetic number, because the mean of its divisors is an integer number (5882920).

Almost surely, 2^91093869 is an apocalyptic number.

It is an amenable number.

91093869 is a deficient number, since it is larger than the sum of its proper divisors (50096211).

91093869 is an equidigital number, since it uses as much as digits as its factorization.

91093869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 91093869 is about 9544.3108184929. The cubic root of 91093869 is about 449.9487497189.

The spelling of 91093869 in words is "ninety-one million, ninety-three thousand, eight hundred sixty-nine".