115309939 has 2 divisors, whose sum is σ = 115309940. Its totient is φ = 115309938.

The previous prime is 115309937. The next prime is 115309951. The reversal of 115309939 is 939903511.

It is a weak prime.

It is an emirp because it is prime and its reverse (939903511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 115309939 - 2¹ = 115309937 is a prime.

Together with 115309937, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (115309937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57654969 + 57654970.

It is an arithmetic number, because the mean of its divisors is an integer number (57654970).

Almost surely, 2^115309939 is an apocalyptic number.

115309939 is a deficient number, since it is larger than the sum of its proper divisors (1).

115309939 is an equidigital number, since it uses as much as digits as its factorization.

115309939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 115309939 is about 10738.2465514627. The cubic root of 115309939 is about 486.7308954344.

The spelling of 115309939 in words is "one hundred fifteen million, three hundred nine thousand, nine hundred thirty-nine".