309339 has 24 divisors (see below), whose sum is σ = 495040. Its totient is φ = 192456.

The previous prime is 309317. The next prime is 309359. The reversal of 309339 is 933903.

It is not a de Polignac number, because 309339 - 2⁸ = 309083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (309359) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4584 + ... + 4650.

2³⁰⁹³³⁹ is an apocalyptic number.

309339 is a deficient number, since it is larger than the sum of its proper divisors (185701).

309339 is an equidigital number, since it uses as much as digits as its factorization.

309339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 2187, while the sum is 27.

The square root of 309339 is about 556.1825239973. The cubic root of 309339 is about 67.6308572639.

The spelling of 309339 in words is "three hundred nine thousand, three hundred thirty-nine".