90999585 has 16 divisors (see below), whose sum is σ = 161777280. Its totient is φ = 48533040.

The previous prime is 90999583. The next prime is 90999599. The reversal of 90999585 is 58599909.

It is not a de Polignac number, because 90999585 - 2¹ = 90999583 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90999583) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336901 + ... + 337170.

It is an arithmetic number, because the mean of its divisors is an integer number (10111080).

Almost surely, 2^90999585 is an apocalyptic number.

It is an amenable number.

90999585 is a deficient number, since it is larger than the sum of its proper divisors (70777695).

90999585 is a wasteful number, since it uses less digits than its factorization.

90999585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 674085 (or 674079 counting only the distinct ones).

The product of its (nonzero) digits is 1312200, while the sum is 54.

The square root of 90999585 is about 9539.3702622343. The cubic root of 90999585 is about 449.7934607735.

The spelling of 90999585 in words is "ninety million, nine hundred ninety-nine thousand, five hundred eighty-five".