384139 has 4 divisors (see below), whose sum is σ = 439024. Its totient is φ = 329256.

The previous prime is 384133. The next prime is 384143. The reversal of 384139 is 931483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931483 = 7 ⋅133069.

It is a cyclic number.

It is not a de Polignac number, because 384139 - 2⁵ = 384107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384133) 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 3 ways as a sum of consecutive naturals, for example, 27432 + ... + 27445.

It is an arithmetic number, because the mean of its divisors is an integer number (109756).

2³⁸⁴¹³⁹ is an apocalyptic number.

384139 is a deficient number, since it is larger than the sum of its proper divisors (54885).

384139 is an equidigital number, since it uses as much as digits as its factorization.

384139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54884.

The product of its digits is 2592, while the sum is 28.

The square root of 384139 is about 619.7894803883. The cubic root of 384139 is about 72.6935927859.

The spelling of 384139 in words is "three hundred eighty-four thousand, one hundred thirty-nine".