115965913 has 4 divisors (see below), whose sum is σ = 132532480. Its totient is φ = 99399348.

The previous prime is 115965869. The next prime is 115965919. The reversal of 115965913 is 319569511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 319569511 = 10859 ⋅29429.

It is a cyclic number.

It is not a de Polignac number, because 115965913 - 2²⁵ = 82411481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115965919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8283273 + ... + 8283286.

It is an arithmetic number, because the mean of its divisors is an integer number (33133120).

Almost surely, 2^115965913 is an apocalyptic number.

It is an amenable number.

115965913 is a deficient number, since it is larger than the sum of its proper divisors (16566567).

115965913 is an equidigital number, since it uses as much as digits as its factorization.

115965913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16566566.

The product of its digits is 36450, while the sum is 40.

The square root of 115965913 is about 10768.7470487518. The cubic root of 115965913 is about 487.6521206620.

The spelling of 115965913 in words is "one hundred fifteen million, nine hundred sixty-five thousand, nine hundred thirteen".