393439 has 4 divisors (see below), whose sum is σ = 397224. Its totient is φ = 389656.

The previous prime is 393413. The next prime is 393451. The reversal of 393439 is 934393.

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 393439 - 2⁷ = 393311 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 393439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393479) 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, 1732 + ... + 1945.

It is an arithmetic number, because the mean of its divisors is an integer number (99306).

2³⁹³⁴³⁹ is an apocalyptic number.

393439 is a deficient number, since it is larger than the sum of its proper divisors (3785).

393439 is a wasteful number, since it uses less digits than its factorization.

393439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3784.

The product of its digits is 8748, while the sum is 31.

The square root of 393439 is about 627.2471602168. The cubic root of 393439 is about 73.2755582593.

The spelling of 393439 in words is "three hundred ninety-three thousand, four hundred thirty-nine".