985604189 has 4 divisors (see below), whose sum is σ = 1043580924. Its totient is φ = 927627456.

The previous prime is 985604153. The next prime is 985604209. The reversal of 985604189 is 981406589.

It is a happy number.

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 923856025 + 61748164 = 30395^2 + 7858^2 .

It is a cyclic number.

It is not a de Polignac number, because 985604189 - 2⁸ = 985603933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985604129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28988342 + ... + 28988375.

It is an arithmetic number, because the mean of its divisors is an integer number (260895231).

Almost surely, 2^985604189 is an apocalyptic number.

It is an amenable number.

985604189 is a deficient number, since it is larger than the sum of its proper divisors (57976735).

985604189 is a wasteful number, since it uses less digits than its factorization.

985604189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57976734.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 985604189 is about 31394.3337084895. Note that the first 3 decimals coincide. The cubic root of 985604189 is about 995.1781837907.

The spelling of 985604189 in words is "nine hundred eighty-five million, six hundred four thousand, one hundred eighty-nine".