85909159 has 4 divisors (see below), whose sum is σ = 98181904. Its totient is φ = 73636416.

The previous prime is 85909157. The next prime is 85909171. The reversal of 85909159 is 95190958.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 85909159 - 2¹ = 85909157 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 (85909157) 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, 6136362 + ... + 6136375.

It is an arithmetic number, because the mean of its divisors is an integer number (24545476).

Almost surely, 2^85909159 is an apocalyptic number.

85909159 is a deficient number, since it is larger than the sum of its proper divisors (12272745).

85909159 is a wasteful number, since it uses less digits than its factorization.

85909159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12272744.

The product of its (nonzero) digits is 145800, while the sum is 46.

The square root of 85909159 is about 9268.7193829568. The cubic root of 85909159 is about 441.2450257446.

It can be divided in two parts, 85909 and 159, that added together give a palindrome (86068).

The spelling of 85909159 in words is "eighty-five million, nine hundred nine thousand, one hundred fifty-nine".