387439 has 4 divisors (see below), whose sum is σ = 417256. Its totient is φ = 357624.

The previous prime is 387437. The next prime is 387449. The reversal of 387439 is 934783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934783 = 47 ⋅19889.

It is a cyclic number.

It is not a de Polignac number, because 387439 - 2¹ = 387437 is a prime.

It is a Duffinian number.

387439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387433) 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, 14889 + ... + 14914.

It is an arithmetic number, because the mean of its divisors is an integer number (104314).

2³⁸⁷⁴³⁹ is an apocalyptic number.

387439 is a deficient number, since it is larger than the sum of its proper divisors (29817).

387439 is a wasteful number, since it uses less digits than its factorization.

387439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29816.

The product of its digits is 18144, while the sum is 34.

The square root of 387439 is about 622.4459815920. The cubic root of 387439 is about 72.9011610386.

The spelling of 387439 in words is "three hundred eighty-seven thousand, four hundred thirty-nine".