115863689 has 2 divisors, whose sum is σ = 115863690. Its totient is φ = 115863688.

The previous prime is 115863679. The next prime is 115863697. The reversal of 115863689 is 986368511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76387600 + 39476089 = 8740^2 + 6283^2 .

It is a cyclic number.

It is not a de Polignac number, because 115863689 - 2¹⁶ = 115798153 is a prime.

It is not a weakly prime, because it can be changed into another prime (115863679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57931844 + 57931845.

It is an arithmetic number, because the mean of its divisors is an integer number (57931845).

Almost surely, 2^115863689 is an apocalyptic number.

It is an amenable number.

115863689 is a deficient number, since it is larger than the sum of its proper divisors (1).

115863689 is an equidigital number, since it uses as much as digits as its factorization.

115863689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 47.

The square root of 115863689 is about 10763.9996748421. Note that the first 3 decimals coincide. The cubic root of 115863689 is about 487.5087900234.

The spelling of 115863689 in words is "one hundred fifteen million, eight hundred sixty-three thousand, six hundred eighty-nine".