90085091 has 8 divisors (see below), whose sum is σ = 95467104. Its totient is φ = 84712320.

The previous prime is 90085081. The next prime is 90085103. The reversal of 90085091 is 19058009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90085091 - 2⁶ = 90085027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90085081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37826 + ... + 40136.

It is an arithmetic number, because the mean of its divisors is an integer number (11933388).

Almost surely, 2^90085091 is an apocalyptic number.

90085091 is a deficient number, since it is larger than the sum of its proper divisors (5382013).

90085091 is a wasteful number, since it uses less digits than its factorization.

90085091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4621.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 90085091 is about 9491.3166104603. The cubic root of 90085091 is about 448.2816624699.

The spelling of 90085091 in words is "ninety million, eighty-five thousand, ninety-one".