86643 has 8 divisors (see below), whose sum is σ = 128400. Its totient is φ = 57744.

The previous prime is 86629. The next prime is 86677. The reversal of 86643 is 34668.

It is not a de Polignac number, because 86643 - 2⁴ = 86627 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 3209 = 86643 / (8 + 6 + 6 + 4 + 3).

It is an Ulam number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (86693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (16050).

2⁸⁶⁶⁴³ is an apocalyptic number.

86643 is a deficient number, since it is larger than the sum of its proper divisors (41757).

86643 is a wasteful number, since it uses less digits than its factorization.

86643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 3212 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 86643 is about 294.3518302984. The cubic root of 86643 is about 44.2497845436.

It can be divided in two parts, 866 and 43, that added together give a palindrome (909).

The spelling of 86643 in words is "eighty-six thousand, six hundred forty-three".