439913 has 4 divisors (see below), whose sum is σ = 444288. Its totient is φ = 435540.

The previous prime is 439903. The next prime is 439919. The reversal of 439913 is 319934.

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.

It is a cyclic number.

It is not a de Polignac number, because 439913 - 2⁶ = 439849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439919) 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, 2033 + ... + 2238.

It is an arithmetic number, because the mean of its divisors is an integer number (111072).

2⁴³⁹⁹¹³ is an apocalyptic number.

It is an amenable number.

439913 is a deficient number, since it is larger than the sum of its proper divisors (4375).

439913 is a wasteful number, since it uses less digits than its factorization.

439913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4374.

The product of its digits is 2916, while the sum is 29.

The square root of 439913 is about 663.2593761116. The cubic root of 439913 is about 76.0540359020.

The spelling of 439913 in words is "four hundred thirty-nine thousand, nine hundred thirteen".