309585345 has 8 divisors (see below), whose sum is σ = 495336576. Its totient is φ = 165112176.

The previous prime is 309585323. The next prime is 309585439. The reversal of 309585345 is 543585903.

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

It is not a de Polignac number, because 309585345 - 2⁶ = 309585281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 309585297 and 309585306.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10319497 + ... + 10319526.

It is an arithmetic number, because the mean of its divisors is an integer number (61917072).

Almost surely, 2^309585345 is an apocalyptic number.

It is an amenable number.

309585345 is a deficient number, since it is larger than the sum of its proper divisors (185751231).

309585345 is a wasteful number, since it uses less digits than its factorization.

309585345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20639031.

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 309585345 is about 17595.0375106165. The cubic root of 309585345 is about 676.4880532182.

The spelling of 309585345 in words is "three hundred nine million, five hundred eighty-five thousand, three hundred forty-five".