85986143 has 4 divisors (see below), whose sum is σ = 88083408. Its totient is φ = 83888880.

The previous prime is 85986139. The next prime is 85986161. The reversal of 85986143 is 34168958.

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 85986143 - 2² = 85986139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85986094 and 85986103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85983143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048571 + ... + 1048652.

It is an arithmetic number, because the mean of its divisors is an integer number (22020852).

Almost surely, 2^85986143 is an apocalyptic number.

85986143 is a deficient number, since it is larger than the sum of its proper divisors (2097265).

85986143 is a wasteful number, since it uses less digits than its factorization.

85986143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2097264.

The product of its digits is 207360, while the sum is 44.

The square root of 85986143 is about 9272.8713460287. The cubic root of 85986143 is about 441.3767876581.

It can be divided in two parts, 8598 and 6143, that added together give a palindrome (14741).

The spelling of 85986143 in words is "eighty-five million, nine hundred eighty-six thousand, one hundred forty-three".