339391309 has 2 divisors, whose sum is σ = 339391310. Its totient is φ = 339391308.

The previous prime is 339391307. The next prime is 339391313. The reversal of 339391309 is 903193933.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274830084 + 64561225 = 16578^2 + 8035^2 .

It is an emirp because it is prime and its reverse (903193933) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 339391309 - 2¹ = 339391307 is a prime.

Together with 339391307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (339391307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169695654 + 169695655.

It is an arithmetic number, because the mean of its divisors is an integer number (169695655).

Almost surely, 2^339391309 is an apocalyptic number.

It is an amenable number.

339391309 is a deficient number, since it is larger than the sum of its proper divisors (1).

339391309 is an equidigital number, since it uses as much as digits as its factorization.

339391309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 40.

The square root of 339391309 is about 18422.5760685090. The cubic root of 339391309 is about 697.5364482095.

The spelling of 339391309 in words is "three hundred thirty-nine million, three hundred ninety-one thousand, three hundred nine".