389709 has 24 divisors (see below), whose sum is σ = 617760. Its totient is φ = 235872.

The previous prime is 389699. The next prime is 389713. The reversal of 389709 is 907983.

It is not a de Polignac number, because 389709 - 2¹⁷ = 258637 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 389709.

It is not an unprimeable number, because it can be changed into a prime (389749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7327 + ... + 7379.

It is an arithmetic number, because the mean of its divisors is an integer number (25740).

2³⁸⁹⁷⁰⁹ is an apocalyptic number.

It is an amenable number.

389709 is a deficient number, since it is larger than the sum of its proper divisors (228051).

389709 is a wasteful number, since it uses less digits than its factorization.

389709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 389709 is about 624.2667698989. The cubic root of 389709 is about 73.0432595287.

The spelling of 389709 in words is "three hundred eighty-nine thousand, seven hundred nine".