505888609 has 4 divisors (see below), whose sum is σ = 506676016. Its totient is φ = 505101204.

The previous prime is 505888583. The next prime is 505888631. The reversal of 505888609 is 906888505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505888609 - 2¹⁷ = 505757537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505882609) 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 3 ways as a sum of consecutive naturals, for example, 392739 + ... + 394024.

It is an arithmetic number, because the mean of its divisors is an integer number (126669004).

Almost surely, 2^505888609 is an apocalyptic number.

It is an amenable number.

505888609 is a deficient number, since it is larger than the sum of its proper divisors (787407).

505888609 is an equidigital number, since it uses as much as digits as its factorization.

505888609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787406.

The product of its (nonzero) digits is 691200, while the sum is 49.

The square root of 505888609 is about 22491.9676551430. The cubic root of 505888609 is about 796.8042347084.

The spelling of 505888609 in words is "five hundred five million, eight hundred eighty-eight thousand, six hundred nine".