8115889 has 2 divisors, whose sum is σ = 8115890. Its totient is φ = 8115888.

The previous prime is 8115883. The next prime is 8115937. The reversal of 8115889 is 9885118.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8025889 + 90000 = 2833^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 8115889 - 2⁵ = 8115857 is a prime.

It is not a weakly prime, because it can be changed into another prime (8115883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4057944 + 4057945.

It is an arithmetic number, because the mean of its divisors is an integer number (4057945).

Almost surely, 2^8115889 is an apocalyptic number.

It is an amenable number.

8115889 is a deficient number, since it is larger than the sum of its proper divisors (1).

8115889 is an equidigital number, since it uses as much as digits as its factorization.

8115889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 40.

The square root of 8115889 is about 2848.8399393437. The cubic root of 8115889 is about 200.9611155526.

The spelling of 8115889 in words is "eight million, one hundred fifteen thousand, eight hundred eighty-nine".