115993409309 has 2 divisors, whose sum is σ = 115993409310. Its totient is φ = 115993409308.

The previous prime is 115993409269. The next prime is 115993409317. The reversal of 115993409309 is 903904399511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99202951225 + 16790458084 = 314965^2 + 129578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115993409309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115993409209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57996704654 + 57996704655.

It is an arithmetic number, because the mean of its divisors is an integer number (57996704655).

Almost surely, 2^115993409309 is an apocalyptic number.

It is an amenable number.

115993409309 is a deficient number, since it is larger than the sum of its proper divisors (1).

115993409309 is an equidigital number, since it uses as much as digits as its factorization.

115993409309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1180980, while the sum is 53.

The spelling of 115993409309 in words is "one hundred fifteen billion, nine hundred ninety-three million, four hundred nine thousand, three hundred nine".