505724869 has 16 divisors (see below), whose sum is σ = 550368000. Its totient is φ = 461932416.

The previous prime is 505724867. The next prime is 505724909. The reversal of 505724869 is 968427505.

It is a cyclic number.

It is not a de Polignac number, because 505724869 - 2¹ = 505724867 is a prime.

It is a super-2 number, since 2×505724869² = 511515286250134322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505724861) 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 15 ways as a sum of consecutive naturals, for example, 602352 + ... + 603190.

It is an arithmetic number, because the mean of its divisors is an integer number (34398000).

Almost surely, 2^505724869 is an apocalyptic number.

It is an amenable number.

505724869 is a deficient number, since it is larger than the sum of its proper divisors (44643131).

505724869 is a wasteful number, since it uses less digits than its factorization.

505724869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 505724869 is about 22488.3273944507. The cubic root of 505724869 is about 796.7182587302.

The spelling of 505724869 in words is "five hundred five million, seven hundred twenty-four thousand, eight hundred sixty-nine".