509922409 has 4 divisors (see below), whose sum is σ = 514873216. Its totient is φ = 504971604.

The previous prime is 509922401. The next prime is 509922467. The reversal of 509922409 is 904229905.

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 509922409 - 2³ = 509922401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509922401) 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, 2475249 + ... + 2475454.

It is an arithmetic number, because the mean of its divisors is an integer number (128718304).

Almost surely, 2^509922409 is an apocalyptic number.

It is an amenable number.

509922409 is a deficient number, since it is larger than the sum of its proper divisors (4950807).

509922409 is a wasteful number, since it uses less digits than its factorization.

509922409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4950806.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 509922409 is about 22581.4616223131. The cubic root of 509922409 is about 798.9164544280.

The spelling of 509922409 in words is "five hundred nine million, nine hundred twenty-two thousand, four hundred nine".