43682 has 4 divisors (see below), whose sum is σ = 65526. Its totient is φ = 21840.

The previous prime is 43669. The next prime is 43691. The reversal of 43682 is 28634.

It is a happy number.

It is a Cunningham number, because it is equal to 209²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 43681 + 1 = 209^2 + 1^2 .

It is a nialpdrome in base 16.

It is an unprimeable number.

43682 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10919 + ... + 10922.

2⁴³⁶⁸² is an apocalyptic number.

43682 is a deficient number, since it is larger than the sum of its proper divisors (21844).

43682 is a wasteful number, since it uses less digits than its factorization.

43682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21843.

The product of its digits is 1152, while the sum is 23.

The square root of 43682 is about 209.0023923308. The cubic root of 43682 is about 35.2182283343.

The spelling of 43682 in words is "forty-three thousand, six hundred eighty-two".