439345 has 4 divisors (see below), whose sum is σ = 527220. Its totient is φ = 351472.

The previous prime is 439339. The next prime is 439349. The reversal of 439345 is 543934.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543934 = 2 ⋅271967.

It can be written as a sum of positive squares in 2 ways, for example, as 74529 + 364816 = 273^2 + 604^2 .

It is a cyclic number.

It is not a de Polignac number, because 439345 - 2⁷ = 439217 is a prime.

439345 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (439349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43930 + ... + 43939.

It is an arithmetic number, because the mean of its divisors is an integer number (131805).

2⁴³⁹³⁴⁵ is an apocalyptic number.

It is an amenable number.

439345 is a deficient number, since it is larger than the sum of its proper divisors (87875).

439345 is an equidigital number, since it uses as much as digits as its factorization.

439345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87874.

The product of its digits is 6480, while the sum is 28.

The square root of 439345 is about 662.8310493633. The cubic root of 439345 is about 76.0212890498.

It can be divided in two parts, 439 and 345, that added together give a square (784 = 28²).

The spelling of 439345 in words is "four hundred thirty-nine thousand, three hundred forty-five".