115965869 has 2 divisors, whose sum is σ = 115965870. Its totient is φ = 115965868.

The previous prime is 115965847. The next prime is 115965919. The reversal of 115965869 is 968569511.

It is an a-pointer prime, because the next prime (115965919) can be obtained adding 115965869 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73324969 + 42640900 = 8563^2 + 6530^2 .

It is a cyclic number.

It is not a de Polignac number, because 115965869 - 2²⁴ = 99188653 is a prime.

It is a super-2 number, since 2×115965869² = 26896165545850322, 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 (115965469) 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 as a sum of consecutive naturals, namely, 57982934 + 57982935.

It is an arithmetic number, because the mean of its divisors is an integer number (57982935).

Almost surely, 2^115965869 is an apocalyptic number.

It is an amenable number.

115965869 is a deficient number, since it is larger than the sum of its proper divisors (1).

115965869 is an equidigital number, since it uses as much as digits as its factorization.

115965869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 50.

The square root of 115965869 is about 10768.7450058027. The cubic root of 115965869 is about 487.6520589867.

The spelling of 115965869 in words is "one hundred fifteen million, nine hundred sixty-five thousand, eight hundred sixty-nine".