506172839 has 8 divisors (see below), whose sum is σ = 532534128. Its totient is φ = 480479040.

The previous prime is 506172827. The next prime is 506172847. The reversal of 506172839 is 938271605.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 506172839 - 2²⁴ = 489395623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 506172796 and 506172805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506172889) 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 7 ways as a sum of consecutive naturals, for example, 165317 + ... + 168350.

It is an arithmetic number, because the mean of its divisors is an integer number (66566766).

Almost surely, 2^506172839 is an apocalyptic number.

506172839 is a deficient number, since it is larger than the sum of its proper divisors (26361289).

506172839 is a wasteful number, since it uses less digits than its factorization.

506172839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333745.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 506172839 is about 22498.2852457693. The cubic root of 506172839 is about 796.9534330775.

The spelling of 506172839 in words is "five hundred six million, one hundred seventy-two thousand, eight hundred thirty-nine".