309338716409 has 2 divisors, whose sum is σ = 309338716410. Its totient is φ = 309338716408.

The previous prime is 309338716397. The next prime is 309338716433. The reversal of 309338716409 is 904617833903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178529910784 + 130808805625 = 422528^2 + 361675^2 .

It is a cyclic number.

It is not a de Polignac number, because 309338716409 - 2³⁶ = 240619239673 is a prime.

It is not a weakly prime, because it can be changed into another prime (309338716459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154669358204 + 154669358205.

It is an arithmetic number, because the mean of its divisors is an integer number (154669358205).

Almost surely, 2^309338716409 is an apocalyptic number.

It is an amenable number.

309338716409 is a deficient number, since it is larger than the sum of its proper divisors (1).

309338716409 is an equidigital number, since it uses as much as digits as its factorization.

309338716409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 309338716409 in words is "three hundred nine billion, three hundred thirty-eight million, seven hundred sixteen thousand, four hundred nine".