309930665 has 8 divisors (see below), whose sum is σ = 405727488. Its totient is φ = 225404080.

The previous prime is 309930631. The next prime is 309930683. The reversal of 309930665 is 566039903.

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

It is not a de Polignac number, because 309930665 - 2²⁰ = 308882089 is a prime.

It is a Duffinian number.

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, 2817497 + ... + 2817606.

It is an arithmetic number, because the mean of its divisors is an integer number (50715936).

Almost surely, 2^309930665 is an apocalyptic number.

It is an amenable number.

309930665 is a deficient number, since it is larger than the sum of its proper divisors (95796823).

309930665 is a wasteful number, since it uses less digits than its factorization.

309930665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5635119.

The product of its (nonzero) digits is 131220, while the sum is 41.

The square root of 309930665 is about 17604.8477698616. The cubic root of 309930665 is about 676.7394842110.

The spelling of 309930665 in words is "three hundred nine million, nine hundred thirty thousand, six hundred sixty-five".