91413585 has 24 divisors (see below), whose sum is σ = 160026984. Its totient is φ = 48268800.

The previous prime is 91413583. The next prime is 91413587. The reversal of 91413585 is 58531419.

It is an interprime number because it is at equal distance from previous prime (91413583) and next prime (91413587).

It can be written as a sum of positive squares in 4 ways, for example, as 10575504 + 80838081 = 3252^2 + 8991^2 .

It is not a de Polignac number, because 91413585 - 2¹ = 91413583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91413583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5512 + ... + 14601.

It is an arithmetic number, because the mean of its divisors is an integer number (6667791).

Almost surely, 2^91413585 is an apocalyptic number.

It is an amenable number.

91413585 is a deficient number, since it is larger than the sum of its proper divisors (68613399).

91413585 is a wasteful number, since it uses less digits than its factorization.

91413585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20225 (or 20222 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 91413585 is about 9561.0451834514. The cubic root of 91413585 is about 450.4745364504.

The spelling of 91413585 in words is "ninety-one million, four hundred thirteen thousand, five hundred eighty-five".