309379345 has 16 divisors (see below), whose sum is σ = 428830848. Its totient is φ = 211767040.

The previous prime is 309379331. The next prime is 309379363. The reversal of 309379345 is 543973903.

It is not a de Polignac number, because 309379345 - 2⁵ = 309379313 is a prime.

It is a super-2 number, since 2×309379345² = 191431158225258050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164509 + ... + 166378.

It is an arithmetic number, because the mean of its divisors is an integer number (26801928).

Almost surely, 2^309379345 is an apocalyptic number.

It is an amenable number.

309379345 is a deficient number, since it is larger than the sum of its proper divisors (119451503).

309379345 is a wasteful number, since it uses less digits than its factorization.

309379345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330920.

The product of its (nonzero) digits is 306180, while the sum is 43.

The square root of 309379345 is about 17589.1826131859. The cubic root of 309379345 is about 676.3379734829.

The spelling of 309379345 in words is "three hundred nine million, three hundred seventy-nine thousand, three hundred forty-five".