85866189 has 8 divisors (see below), whose sum is σ = 114579840. Its totient is φ = 57198336.

The previous prime is 85866173. The next prime is 85866197. The reversal of 85866189 is 98166858.

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

It is not a de Polignac number, because 85866189 - 2⁴ = 85866173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85866119) 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, 6804 + ... + 14765.

It is an arithmetic number, because the mean of its divisors is an integer number (14322480).

Almost surely, 2^85866189 is an apocalyptic number.

It is an amenable number.

85866189 is a deficient number, since it is larger than the sum of its proper divisors (28713651).

85866189 is a wasteful number, since it uses less digits than its factorization.

85866189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22899.

The product of its digits is 829440, while the sum is 51.

The square root of 85866189 is about 9266.4010813260. The cubic root of 85866189 is about 441.1714462372.

The spelling of 85866189 in words is "eighty-five million, eight hundred sixty-six thousand, one hundred eighty-nine".