115516589 has 2 divisors, whose sum is σ = 115516590. Its totient is φ = 115516588.

The previous prime is 115516573. The next prime is 115516601. The reversal of 115516589 is 985615511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115390564 + 126025 = 10742^2 + 355^2 .

It is a cyclic number.

It is not a de Polignac number, because 115516589 - 2⁴ = 115516573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115516549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57758294 + 57758295.

It is an arithmetic number, because the mean of its divisors is an integer number (57758295).

Almost surely, 2^115516589 is an apocalyptic number.

It is an amenable number.

115516589 is a deficient number, since it is larger than the sum of its proper divisors (1).

115516589 is an equidigital number, since it uses as much as digits as its factorization.

115516589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 41.

The square root of 115516589 is about 10747.8643925200. The cubic root of 115516589 is about 487.0214830293.

The spelling of 115516589 in words is "one hundred fifteen million, five hundred sixteen thousand, five hundred eighty-nine".