506439913 has 24 divisors (see below), whose sum is σ = 598997504. Its totient is φ = 419420160.

The previous prime is 506439883. The next prime is 506439919. The reversal of 506439913 is 319934605.

It is a de Polignac number, because none of the positive numbers 2^k-506439913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (506439919) 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 23 ways as a sum of consecutive naturals, for example, 2270920 + ... + 2271142.

Almost surely, 2^506439913 is an apocalyptic number.

It is an amenable number.

506439913 is a deficient number, since it is larger than the sum of its proper divisors (92557591).

506439913 is a wasteful number, since it uses less digits than its factorization.

506439913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 506439913 is about 22504.2198931667. The cubic root of 506439913 is about 797.0935750086.

The spelling of 506439913 in words is "five hundred six million, four hundred thirty-nine thousand, nine hundred thirteen".