439129 has 4 divisors (see below), whose sum is σ = 442084. Its totient is φ = 436176.

The previous prime is 439123. The next prime is 439133. The reversal of 439129 is 921934.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 227529 + 211600 = 477^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 439129 - 2¹⁵ = 406361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 439097 and 439106.

It is not an unprimeable number, because it can be changed into a prime (439123) 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, 1242 + ... + 1555.

It is an arithmetic number, because the mean of its divisors is an integer number (110521).

2⁴³⁹¹²⁹ is an apocalyptic number.

It is an amenable number.

439129 is a deficient number, since it is larger than the sum of its proper divisors (2955).

439129 is a wasteful number, since it uses less digits than its factorization.

439129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2954.

The product of its digits is 1944, while the sum is 28.

The square root of 439129 is about 662.6680918831. The cubic root of 439129 is about 76.0088286143.

The spelling of 439129 in words is "four hundred thirty-nine thousand, one hundred twenty-nine".