344839309 has 2 divisors, whose sum is σ = 344839310. Its totient is φ = 344839308.

The previous prime is 344839307. The next prime is 344839331. The reversal of 344839309 is 903938443.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218389284 + 126450025 = 14778^2 + 11245^2 .

It is a cyclic number.

It is not a de Polignac number, because 344839309 - 2¹ = 344839307 is a prime.

Together with 344839307, 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 (344839307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172419654 + 172419655.

It is an arithmetic number, because the mean of its divisors is an integer number (172419655).

Almost surely, 2^344839309 is an apocalyptic number.

It is an amenable number.

344839309 is a deficient number, since it is larger than the sum of its proper divisors (1).

344839309 is an equidigital number, since it uses as much as digits as its factorization.

344839309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 43.

The square root of 344839309 is about 18569.8494608869. The cubic root of 344839309 is about 701.2490007114.

The spelling of 344839309 in words is "three hundred forty-four million, eight hundred thirty-nine thousand, three hundred nine".