85085091 has 24 divisors (see below), whose sum is σ = 151263840. Its totient is φ = 44879616.

The previous prime is 85085081. The next prime is 85085093. The reversal of 85085091 is 19058058.

It is not a de Polignac number, because 85085091 - 2¹⁴ = 85068707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85085093) 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, 51126 + ... + 52763.

It is an arithmetic number, because the mean of its divisors is an integer number (6302660).

Almost surely, 2^85085091 is an apocalyptic number.

85085091 is a deficient number, since it is larger than the sum of its proper divisors (66178749).

85085091 is a wasteful number, since it uses less digits than its factorization.

85085091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103915 (or 103912 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 85085091 is about 9224.1580103552. The cubic root of 85085091 is about 439.8296361802.

The spelling of 85085091 in words is "eighty-five million, eighty-five thousand, ninety-one".