389005 has 4 divisors (see below), whose sum is σ = 466812. Its totient is φ = 311200.

The previous prime is 389003. The next prime is 389023. The reversal of 389005 is 500983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500983 = 7 ⋅71569.

It can be written as a sum of positive squares in 2 ways, for example, as 175561 + 213444 = 419^2 + 462^2 .

It is not a de Polignac number, because 389005 - 2¹ = 389003 is a prime.

It is an Ulam number.

It is a Duffinian number.

389005 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389003) by changing a digit.

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, 38896 + ... + 38905.

It is an arithmetic number, because the mean of its divisors is an integer number (116703).

2³⁸⁹⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

389005 is a deficient number, since it is larger than the sum of its proper divisors (77807).

389005 is an equidigital number, since it uses as much as digits as its factorization.

389005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77806.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 389005 is about 623.7026535137. The cubic root of 389005 is about 72.9992493824. Note that the first 3 decimals are identical.

Adding to 389005 its reverse (500983), we get a palindrome (889988).

The spelling of 389005 in words is "three hundred eighty-nine thousand, five".