85633189 has 2 divisors, whose sum is σ = 85633190. Its totient is φ = 85633188.

The previous prime is 85633187. The next prime is 85633217. The reversal of 85633189 is 98133658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66422500 + 19210689 = 8150^2 + 4383^2 .

It is a cyclic number.

It is not a de Polignac number, because 85633189 - 2¹ = 85633187 is a prime.

Together with 85633187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85633181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42816594 + 42816595.

It is an arithmetic number, because the mean of its divisors is an integer number (42816595).

Almost surely, 2^85633189 is an apocalyptic number.

It is an amenable number.

85633189 is a deficient number, since it is larger than the sum of its proper divisors (1).

85633189 is an equidigital number, since it uses as much as digits as its factorization.

85633189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 43.

The square root of 85633189 is about 9253.8202381503. The cubic root of 85633189 is about 440.7720415912.

The spelling of 85633189 in words is "eighty-five million, six hundred thirty-three thousand, one hundred eighty-nine".