389670565 has 4 divisors (see below), whose sum is σ = 467604684. Its totient is φ = 311736448.

The previous prime is 389670557. The next prime is 389670587. The reversal of 389670565 is 565076983.

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 310922689 + 78747876 = 17633^2 + 8874^2 .

It is a cyclic number.

It is not a de Polignac number, because 389670565 - 2³ = 389670557 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38967052 + ... + 38967061.

It is an arithmetic number, because the mean of its divisors is an integer number (116901171).

Almost surely, 2^389670565 is an apocalyptic number.

It is an amenable number.

389670565 is a deficient number, since it is larger than the sum of its proper divisors (77934119).

389670565 is an equidigital number, since it uses as much as digits as its factorization.

389670565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77934118.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 389670565 is about 19740.0751011743. The cubic root of 389670565 is about 730.4085815573.

The spelling of 389670565 in words is "three hundred eighty-nine million, six hundred seventy thousand, five hundred sixty-five".