82189643 has 4 divisors (see below), whose sum is σ = 82320528. Its totient is φ = 82058760.

The previous prime is 82189633. The next prime is 82189669. The reversal of 82189643 is 34698128.

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 82189643 - 2¹⁰ = 82188619 is a prime.

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 82189643.

It is not an unprimeable number, because it can be changed into a prime (82189633) 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, 64496 + ... + 65757.

It is an arithmetic number, because the mean of its divisors is an integer number (20580132).

Almost surely, 2^82189643 is an apocalyptic number.

82189643 is a deficient number, since it is larger than the sum of its proper divisors (130885).

82189643 is a wasteful number, since it uses less digits than its factorization.

82189643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130884.

The product of its digits is 82944, while the sum is 41.

The square root of 82189643 is about 9065.8503737929. The cubic root of 82189643 is about 434.7828096203.

The spelling of 82189643 in words is "eighty-two million, one hundred eighty-nine thousand, six hundred forty-three".