505038689 has 8 divisors (see below), whose sum is σ = 508725672. Its totient is φ = 501361920.

The previous prime is 505038673. The next prime is 505038707. The reversal of 505038689 is 986830505.

It can be written as a sum of positive squares in 4 ways, for example, as 21390625 + 483648064 = 4625^2 + 21992^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 505038689 - 2⁴ = 505038673 is a prime.

It is a super-3 number, since 3×505038689³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505038619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116057 + ... + 120329.

It is an arithmetic number, because the mean of its divisors is an integer number (63590709).

Almost surely, 2^505038689 is an apocalyptic number.

It is an amenable number.

505038689 is a deficient number, since it is larger than the sum of its proper divisors (3686983).

505038689 is a wasteful number, since it uses less digits than its factorization.

505038689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 505038689 is about 22473.0658567094. The cubic root of 505038689 is about 796.3577599623.

The spelling of 505038689 in words is "five hundred five million, thirty-eight thousand, six hundred eighty-nine".