439879 has 4 divisors (see below), whose sum is σ = 479880. Its totient is φ = 399880.

The previous prime is 439867. The next prime is 439883. The reversal of 439879 is 978934.

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 439879 - 2⁹ = 439367 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439849) 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, 19984 + ... + 20005.

It is an arithmetic number, because the mean of its divisors is an integer number (119970).

2⁴³⁹⁸⁷⁹ is an apocalyptic number.

439879 is a deficient number, since it is larger than the sum of its proper divisors (40001).

439879 is a wasteful number, since it uses less digits than its factorization.

439879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40000.

The product of its digits is 54432, while the sum is 40.

The square root of 439879 is about 663.2337446180. The cubic root of 439879 is about 76.0520764965.

It can be divided in two parts, 439 and 879, that multiplied together give a triangular number (385881 = T₈₇₈).

The spelling of 439879 in words is "four hundred thirty-nine thousand, eight hundred seventy-nine".