505679915 has 32 divisors (see below), whose sum is σ = 666133440. Its totient is φ = 366280704.

The previous prime is 505679903. The next prime is 505679917. The reversal of 505679915 is 519976505.

It is a cyclic number.

It is not a de Polignac number, because 505679915 - 2¹⁰ = 505678891 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505679915.

It is not an unprimeable number, because it can be changed into a prime (505679917) 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 31 ways as a sum of consecutive naturals, for example, 876107 + ... + 876683.

It is an arithmetic number, because the mean of its divisors is an integer number (20816670).

Almost surely, 2^505679915 is an apocalyptic number.

505679915 is a deficient number, since it is larger than the sum of its proper divisors (160453525).

505679915 is a wasteful number, since it uses less digits than its factorization.

505679915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831.

The product of its (nonzero) digits is 425250, while the sum is 47.

The square root of 505679915 is about 22487.3278759394. The cubic root of 505679915 is about 796.6946512075.

The spelling of 505679915 in words is "five hundred five million, six hundred seventy-nine thousand, nine hundred fifteen".