509669219 has 4 divisors (see below), whose sum is σ = 515809896. Its totient is φ = 503528544.

The previous prime is 509669183. The next prime is 509669221. The reversal of 509669219 is 912966905.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 509669219 - 2¹⁶ = 509603683 is a prime.

It is a super-2 number, since 2×509669219² = 519525425592139922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509669819) 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, 3070214 + ... + 3070379.

It is an arithmetic number, because the mean of its divisors is an integer number (128952474).

Almost surely, 2^509669219 is an apocalyptic number.

509669219 is a deficient number, since it is larger than the sum of its proper divisors (6140677).

509669219 is an equidigital number, since it uses as much as digits as its factorization.

509669219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140676.

The product of its (nonzero) digits is 262440, while the sum is 47.

The square root of 509669219 is about 22575.8547789447. The cubic root of 509669219 is about 798.7842048011.

The spelling of 509669219 in words is "five hundred nine million, six hundred sixty-nine thousand, two hundred nineteen".