439399 has 4 divisors (see below), whose sum is σ = 465264. Its totient is φ = 413536.

The previous prime is 439381. The next prime is 439409. The reversal of 439399 is 993934.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 439399 - 2⁵ = 439367 is a prime.

It is a d-powerful number, because it can be written as 4⁹ + 3⁴ + 3¹¹ + 9 + 9 + 9 .

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439339) 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, 12907 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (116316).

2⁴³⁹³⁹⁹ is an apocalyptic number.

439399 is a deficient number, since it is larger than the sum of its proper divisors (25865).

439399 is a wasteful number, since it uses less digits than its factorization.

439399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25864.

The product of its digits is 26244, while the sum is 37.

The square root of 439399 is about 662.8717824738. The cubic root of 439399 is about 76.0244035206.

It can be divided in two parts, 439 and 399, that added together give a palindrome (838).

The spelling of 439399 in words is "four hundred thirty-nine thousand, three hundred ninety-nine".