115965919 has 2 divisors, whose sum is σ = 115965920. Its totient is φ = 115965918.

The previous prime is 115965869. The next prime is 115965923. The reversal of 115965919 is 919569511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115965919 - 2¹¹ = 115963871 is a prime.

It is a super-2 number, since 2×115965919² = 26896188739029122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115965929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57982959 + 57982960.

It is an arithmetic number, because the mean of its divisors is an integer number (57982960).

Almost surely, 2^115965919 is an apocalyptic number.

115965919 is a deficient number, since it is larger than the sum of its proper divisors (1).

115965919 is an equidigital number, since it uses as much as digits as its factorization.

115965919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109350, while the sum is 46.

The square root of 115965919 is about 10768.7473273357. The cubic root of 115965919 is about 487.6521290722.

The spelling of 115965919 in words is "one hundred fifteen million, nine hundred sixty-five thousand, nine hundred nineteen".