439431 has 4 divisors (see below), whose sum is σ = 585912. Its totient is φ = 292952.

The previous prime is 439429. The next prime is 439441. The reversal of 439431 is 134934.

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 439431 - 2¹ = 439429 is a prime.

It is a super-2 number, since 2×439431² = 386199207522, which contains 22 as substring.

It is a D-number.

439431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439421) 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, 73236 + ... + 73241.

It is an arithmetic number, because the mean of its divisors is an integer number (146478).

2⁴³⁹⁴³¹ is an apocalyptic number.

439431 is a deficient number, since it is larger than the sum of its proper divisors (146481).

439431 is a wasteful number, since it uses less digits than its factorization.

439431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146480.

The product of its digits is 1296, while the sum is 24.

The square root of 439431 is about 662.8959194323. The cubic root of 439431 is about 76.0262490124.

The spelling of 439431 in words is "four hundred thirty-nine thousand, four hundred thirty-one".