43439 has 6 divisors (see below), whose sum is σ = 47880. Its totient is φ = 39380.

The previous prime is 43427. The next prime is 43441. The reversal of 43439 is 93434.

It is not a de Polignac number, because 43439 - 2¹² = 39343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43499) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59 + ... + 300.

It is an arithmetic number, because the mean of its divisors is an integer number (7980).

2⁴³⁴³⁹ is an apocalyptic number.

43439 is a deficient number, since it is larger than the sum of its proper divisors (4441).

43439 is a wasteful number, since it uses less digits than its factorization.

43439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 370 counting only the distinct ones).

The product of its digits is 1296, while the sum is 23.

The square root of 43439 is about 208.4202485365. The cubic root of 43439 is about 35.1528013243.

It can be divided in two parts, 4 and 3439, that added together give a palindrome (3443).

The spelling of 43439 in words is "forty-three thousand, four hundred thirty-nine".