506539439 has 4 divisors (see below), whose sum is σ = 578902224. Its totient is φ = 434176656.

The previous prime is 506539417. The next prime is 506539447. The reversal of 506539439 is 934935605.

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 506539439 - 2²⁰ = 505490863 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 506539439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506539409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36181382 + ... + 36181395.

It is an arithmetic number, because the mean of its divisors is an integer number (144725556).

Almost surely, 2^506539439 is an apocalyptic number.

506539439 is a deficient number, since it is larger than the sum of its proper divisors (72362785).

506539439 is an equidigital number, since it uses as much as digits as its factorization.

506539439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72362784.

The product of its (nonzero) digits is 437400, while the sum is 44.

The square root of 506539439 is about 22506.4310586996. The cubic root of 506539439 is about 797.1457867563.

The spelling of 506539439 in words is "five hundred six million, five hundred thirty-nine thousand, four hundred thirty-nine".