389308085 has 4 divisors (see below), whose sum is σ = 467169708. Its totient is φ = 311446464.

The previous prime is 389308069. The next prime is 389308091. The reversal of 389308085 is 580803983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580803983 = 16903 ⋅34361.

It can be written as a sum of positive squares in 2 ways, for example, as 173159281 + 216148804 = 13159^2 + 14702^2 .

It is a cyclic number.

It is not a de Polignac number, because 389308085 - 2⁴ = 389308069 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38930804 + ... + 38930813.

It is an arithmetic number, because the mean of its divisors is an integer number (116792427).

Almost surely, 2^389308085 is an apocalyptic number.

It is an amenable number.

389308085 is a deficient number, since it is larger than the sum of its proper divisors (77861623).

389308085 is an equidigital number, since it uses as much as digits as its factorization.

389308085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77861622.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 389308085 is about 19730.8916422953. The cubic root of 389308085 is about 730.1820306674.

The spelling of 389308085 in words is "three hundred eighty-nine million, three hundred eight thousand, eighty-five".