85190089 has 4 divisors (see below), whose sum is σ = 85622724. Its totient is φ = 84757456.

The previous prime is 85190071. The next prime is 85190093. The reversal of 85190089 is 98009158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80640400 + 4549689 = 8980^2 + 2133^2 .

It is a cyclic number.

It is not a de Polignac number, because 85190089 - 2¹⁵ = 85157321 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85190059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216022 + ... + 216415.

It is an arithmetic number, because the mean of its divisors is an integer number (21405681).

Almost surely, 2^85190089 is an apocalyptic number.

It is an amenable number.

85190089 is a deficient number, since it is larger than the sum of its proper divisors (432635).

85190089 is a wasteful number, since it uses less digits than its factorization.

85190089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432634.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 85190089 is about 9229.8477235543. The cubic root of 85190089 is about 440.0104835656.

The spelling of 85190089 in words is "eighty-five million, one hundred ninety thousand, eighty-nine".