389161309 has 8 divisors (see below), whose sum is σ = 399975840. Its totient is φ = 378427056.

The previous prime is 389161303. The next prime is 389161313. The reversal of 389161309 is 903161983.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 389161309 - 2⁹ = 389160797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389161303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10174 + ... + 29695.

It is an arithmetic number, because the mean of its divisors is an integer number (49996980).

Almost surely, 2^389161309 is an apocalyptic number.

It is an amenable number.

389161309 is a deficient number, since it is larger than the sum of its proper divisors (10814531).

389161309 is a wasteful number, since it uses less digits than its factorization.

389161309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40139.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 389161309 is about 19727.1718449452. The cubic root of 389161309 is about 730.0902553071.

The spelling of 389161309 in words is "three hundred eighty-nine million, one hundred sixty-one thousand, three hundred nine".