389139 has 8 divisors (see below), whose sum is σ = 546240. Its totient is φ = 245736.

The previous prime is 389117. The next prime is 389141. The reversal of 389139 is 931983.

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

It is not a de Polignac number, because 389139 - 2¹⁷ = 258067 is a prime.

It is a super-2 number, since 2×389139² = 302858322642, which contains 22 as substring.

389139 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (389149) 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, 3357 + ... + 3470.

It is an arithmetic number, because the mean of its divisors is an integer number (68280).

2³⁸⁹¹³⁹ is an apocalyptic number.

389139 is a deficient number, since it is larger than the sum of its proper divisors (157101).

389139 is a wasteful number, since it uses less digits than its factorization.

389139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6849.

The product of its digits is 5832, while the sum is 33.

The square root of 389139 is about 623.8100672480. The cubic root of 389139 is about 73.0076304027.

It can be divided in two parts, 389 and 139, that added together give a triangular number (528 = T₃₂).

The spelling of 389139 in words is "three hundred eighty-nine thousand, one hundred thirty-nine".