505547009 has 4 divisors (see below), whose sum is σ = 551505840. Its totient is φ = 459588180.

The previous prime is 505546997. The next prime is 505547023. The reversal of 505547009 is 900745505.

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 505547009 - 2²⁴ = 488769793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505547009.

It is not an unprimeable number, because it can be changed into a prime (505547059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22979399 + ... + 22979420.

It is an arithmetic number, because the mean of its divisors is an integer number (137876460).

Almost surely, 2^505547009 is an apocalyptic number.

It is an amenable number.

505547009 is a deficient number, since it is larger than the sum of its proper divisors (45958831).

505547009 is a wasteful number, since it uses less digits than its factorization.

505547009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45958830.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 505547009 is about 22484.3725507295. The cubic root of 505547009 is about 796.6248476460.

The spelling of 505547009 in words is "five hundred five million, five hundred forty-seven thousand, nine".