85389561 has 6 divisors (see below), whose sum is σ = 123340490. Its totient is φ = 56926368.

The previous prime is 85389509. The next prime is 85389571. The reversal of 85389561 is 16598358.

85389561 is a `hidden beast` number, since 8 + 5 + 3 + 89 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75429225 + 9960336 = 8685^2 + 3156^2 .

It is not a de Polignac number, because 85389561 - 2¹³ = 85381369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85389571) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4743856 + ... + 4743873.

Almost surely, 2^85389561 is an apocalyptic number.

It is an amenable number.

85389561 is a deficient number, since it is larger than the sum of its proper divisors (37950929).

85389561 is a wasteful number, since it uses less digits than its factorization.

85389561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9487735 (or 9487732 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The square root of 85389561 is about 9240.6472175925. The cubic root of 85389561 is about 440.3536430305.

The spelling of 85389561 in words is "eighty-five million, three hundred eighty-nine thousand, five hundred sixty-one".