439013 has 4 divisors (see below), whose sum is σ = 440448. Its totient is φ = 437580.

The previous prime is 439009. The next prime is 439063. The reversal of 439013 is 310934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 439013 - 2² = 439009 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 (439063) 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, 53 + ... + 938.

It is an arithmetic number, because the mean of its divisors is an integer number (110112).

2⁴³⁹⁰¹³ is an apocalyptic number.

It is an amenable number.

439013 is a deficient number, since it is larger than the sum of its proper divisors (1435).

439013 is an equidigital number, since it uses as much as digits as its factorization.

439013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 439013 is about 662.5805611395. The cubic root of 439013 is about 76.0021352124.

Adding to 439013 its reverse (310934), we get a palindrome (749947).

The spelling of 439013 in words is "four hundred thirty-nine thousand, thirteen".