85965143 has 4 divisors (see below), whose sum is σ = 93780168. Its totient is φ = 78150120.

The previous prime is 85965133. The next prime is 85965163. The reversal of 85965143 is 34156958.

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

It is a cyclic number.

It is not a de Polignac number, because 85965143 - 2⁶ = 85965079 is a prime.

It is a super-2 number, since 2×85965143² = 14780011622020898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85965143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85965133) 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, 3907496 + ... + 3907517.

It is an arithmetic number, because the mean of its divisors is an integer number (23445042).

Almost surely, 2^85965143 is an apocalyptic number.

85965143 is a deficient number, since it is larger than the sum of its proper divisors (7815025).

85965143 is a wasteful number, since it uses less digits than its factorization.

85965143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7815024.

The product of its digits is 129600, while the sum is 41.

The square root of 85965143 is about 9271.7389415363. The cubic root of 85965143 is about 441.3408529253.

The spelling of 85965143 in words is "eighty-five million, nine hundred sixty-five thousand, one hundred forty-three".