43684085 has 4 divisors (see below), whose sum is σ = 52420908. Its totient is φ = 34947264.

The previous prime is 43684079. The next prime is 43684111. The reversal of 43684085 is 58048634.

It is a happy number.

43684085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27636049 + 16048036 = 5257^2 + 4006^2 .

It is a cyclic number.

It is not a de Polignac number, because 43684085 - 2¹² = 43679989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4368404 + ... + 4368413.

It is an arithmetic number, because the mean of its divisors is an integer number (13105227).

Almost surely, 2^43684085 is an apocalyptic number.

It is an amenable number.

43684085 is a deficient number, since it is larger than the sum of its proper divisors (8736823).

43684085 is an equidigital number, since it uses as much as digits as its factorization.

43684085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8736822.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 43684085 is about 6609.3936938270. The cubic root of 43684085 is about 352.1878866303.

The spelling of 43684085 in words is "forty-three million, six hundred eighty-four thousand, eighty-five".