85641189 has 32 divisors (see below), whose sum is σ = 131420160. Its totient is φ = 49248000.

The previous prime is 85641187. The next prime is 85641197. The reversal of 85641189 is 98114658.

It is not a de Polignac number, because 85641189 - 2¹ = 85641187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85641189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85641187) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28614 + ... + 31464.

It is an arithmetic number, because the mean of its divisors is an integer number (4106880).

Almost surely, 2^85641189 is an apocalyptic number.

It is an amenable number.

85641189 is a deficient number, since it is larger than the sum of its proper divisors (45778971).

85641189 is a wasteful number, since it uses less digits than its factorization.

85641189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2921.

The product of its digits is 69120, while the sum is 42.

The square root of 85641189 is about 9254.2524819674. The cubic root of 85641189 is about 440.7857670582.

The spelling of 85641189 in words is "eighty-five million, six hundred forty-one thousand, one hundred eighty-nine".