439729 has 2 divisors, whose sum is σ = 439730. Its totient is φ = 439728.

The previous prime is 439723. The next prime is 439753. The reversal of 439729 is 927934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 61504 = 615^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 439729 - 2⁵ = 439697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 439694 and 439703.

It is not a weakly prime, because it can be changed into another prime (439723) 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 as a sum of consecutive naturals, namely, 219864 + 219865.

It is an arithmetic number, because the mean of its divisors is an integer number (219865).

2⁴³⁹⁷²⁹ is an apocalyptic number.

It is an amenable number.

439729 is a deficient number, since it is larger than the sum of its proper divisors (1).

439729 is an equidigital number, since it uses as much as digits as its factorization.

439729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 439729 is about 663.1206526719. The cubic root of 439729 is about 76.0434308550.

The spelling of 439729 in words is "four hundred thirty-nine thousand, seven hundred twenty-nine".