505394239 has 8 divisors (see below), whose sum is σ = 580587680. Its totient is φ = 430949376.

The previous prime is 505394237. The next prime is 505394261. The reversal of 505394239 is 932493505.

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 505394239 - 2¹ = 505394237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505394237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185694 + ... + 188395.

It is an arithmetic number, because the mean of its divisors is an integer number (72573460).

Almost surely, 2^505394239 is an apocalyptic number.

505394239 is a deficient number, since it is larger than the sum of its proper divisors (75193441).

505394239 is a wasteful number, since it uses less digits than its factorization.

505394239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374289.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 505394239 is about 22480.9750455802. The cubic root of 505394239 is about 796.5445961978.

The spelling of 505394239 in words is "five hundred five million, three hundred ninety-four thousand, two hundred thirty-nine".