115875989 has 2 divisors, whose sum is σ = 115875990. Its totient is φ = 115875988.

The previous prime is 115875983. The next prime is 115876021. The reversal of 115875989 is 989578511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112042225 + 3833764 = 10585^2 + 1958^2 .

It is a cyclic number.

It is not a de Polignac number, because 115875989 - 2⁴ = 115875973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115875989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115875983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57937994 + 57937995.

It is an arithmetic number, because the mean of its divisors is an integer number (57937995).

Almost surely, 2^115875989 is an apocalyptic number.

It is an amenable number.

115875989 is a deficient number, since it is larger than the sum of its proper divisors (1).

115875989 is an equidigital number, since it uses as much as digits as its factorization.

115875989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 53.

The square root of 115875989 is about 10764.5710086375. The cubic root of 115875989 is about 487.5260405989.

It can be divided in two parts, 11587 and 5989, that added together give a cube (17576 = 26³).

The spelling of 115875989 in words is "one hundred fifteen million, eight hundred seventy-five thousand, nine hundred eighty-nine".