509194469 has 4 divisors (see below), whose sum is σ = 581936544. Its totient is φ = 436452396.

The previous prime is 509194453. The next prime is 509194501. The reversal of 509194469 is 964491905.

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 509194469 - 2⁴ = 509194453 is a prime.

It is a super-2 number, since 2×509194469² = 518558014520383922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509199469) 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, 36371027 + ... + 36371040.

It is an arithmetic number, because the mean of its divisors is an integer number (145484136).

Almost surely, 2^509194469 is an apocalyptic number.

It is an amenable number.

509194469 is a deficient number, since it is larger than the sum of its proper divisors (72742075).

509194469 is an equidigital number, since it uses as much as digits as its factorization.

509194469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72742074.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 509194469 is about 22565.3377772193. The cubic root of 509194469 is about 798.5361088498.

The spelling of 509194469 in words is "five hundred nine million, one hundred ninety-four thousand, four hundred sixty-nine".