439091 has 4 divisors (see below), whose sum is σ = 441384. Its totient is φ = 436800.

The previous prime is 439081. The next prime is 439123. The reversal of 439091 is 190934.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190934 = 2 ⋅95467.

It is a cyclic number.

It is not a de Polignac number, because 439091 - 2¹⁴ = 422707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 439091.

It is not an unprimeable number, because it can be changed into a prime (439081) 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, 830 + ... + 1251.

It is an arithmetic number, because the mean of its divisors is an integer number (110346).

2⁴³⁹⁰⁹¹ is an apocalyptic number.

439091 is a deficient number, since it is larger than the sum of its proper divisors (2293).

439091 is a wasteful number, since it uses less digits than its factorization.

439091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 439091 is about 662.6394192923. The cubic root of 439091 is about 76.0066360780.

The spelling of 439091 in words is "four hundred thirty-nine thousand, ninety-one".