518323309 has 8 divisors (see below), whose sum is σ = 595440320. Its totient is φ = 441974016.

The previous prime is 518323307. The next prime is 518323339. The reversal of 518323309 is 903323815.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 518323309 - 2¹ = 518323307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518323303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190479 + ... + 193180.

It is an arithmetic number, because the mean of its divisors is an integer number (74430040).

Almost surely, 2^518323309 is an apocalyptic number.

It is an amenable number.

518323309 is a deficient number, since it is larger than the sum of its proper divisors (77117011).

518323309 is a wasteful number, since it uses less digits than its factorization.

518323309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383859.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 518323309 is about 22766.7149365032. The cubic root of 518323309 is about 803.2799243469.

The spelling of 518323309 in words is "five hundred eighteen million, three hundred twenty-three thousand, three hundred nine".