85851959 has 4 divisors (see below), whose sum is σ = 85894200. Its totient is φ = 85809720.

The previous prime is 85851947. The next prime is 85851971. The reversal of 85851959 is 95915858.

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

It is an interprime number because it is at equal distance from previous prime (85851947) and next prime (85851971).

It is a cyclic number.

It is not a de Polignac number, because 85851959 - 2²⁴ = 69074743 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 (85851559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17909 + ... + 22190.

It is an arithmetic number, because the mean of its divisors is an integer number (21473550).

Almost surely, 2^85851959 is an apocalyptic number.

85851959 is a deficient number, since it is larger than the sum of its proper divisors (42241).

85851959 is a wasteful number, since it uses less digits than its factorization.

85851959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42240.

The product of its digits is 648000, while the sum is 50.

The square root of 85851959 is about 9265.6332217501. The cubic root of 85851959 is about 441.1470741431.

The spelling of 85851959 in words is "eighty-five million, eight hundred fifty-one thousand, nine hundred fifty-nine".