309343445 has 8 divisors (see below), whose sum is σ = 387351936. Its totient is φ = 236714896.

The previous prime is 309343403. The next prime is 309343459. The reversal of 309343445 is 544343903.

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

It is not a de Polignac number, because 309343445 - 2⁸ = 309343189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344857 + ... + 1345086.

It is an arithmetic number, because the mean of its divisors is an integer number (48418992).

Almost surely, 2^309343445 is an apocalyptic number.

It is an amenable number.

309343445 is a deficient number, since it is larger than the sum of its proper divisors (78008491).

309343445 is a wasteful number, since it uses less digits than its factorization.

309343445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689971.

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 309343445 is about 17588.1620699833. The cubic root of 309343445 is about 676.3118119944.

The spelling of 309343445 in words is "three hundred nine million, three hundred forty-three thousand, four hundred forty-five".