85559391 has 6 divisors (see below), whose sum is σ = 123585800. Its totient is φ = 57039588.

The previous prime is 85559389. The next prime is 85559401. The reversal of 85559391 is 19395558.

85559391 is a `hidden beast` number, since 8 + 5 + 559 + 3 + 91 = 666.

It is not a de Polignac number, because 85559391 - 2¹ = 85559389 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 (85559321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4753291 + ... + 4753308.

Almost surely, 2^85559391 is an apocalyptic number.

85559391 is a deficient number, since it is larger than the sum of its proper divisors (38026409).

85559391 is a wasteful number, since it uses less digits than its factorization.

85559391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9506605 (or 9506602 counting only the distinct ones).

The product of its digits is 243000, while the sum is 45.

The square root of 85559391 is about 9249.8319444193. The cubic root of 85559391 is about 440.6453872565.

The spelling of 85559391 in words is "eighty-five million, five hundred fifty-nine thousand, three hundred ninety-one".