815086989 has 8 divisors (see below), whose sum is σ = 1207536320. Its totient is φ = 543391308.

The previous prime is 815086969. The next prime is 815087017. The reversal of 815086989 is 989680518.

815086989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 815086989 - 2⁵ = 815086957 is a prime.

It is a super-2 number, since 2×815086989² = 1328733599274172242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815086919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15094177 + ... + 15094230.

It is an arithmetic number, because the mean of its divisors is an integer number (150942040).

Almost surely, 2^815086989 is an apocalyptic number.

It is an amenable number.

815086989 is a deficient number, since it is larger than the sum of its proper divisors (392449331).

815086989 is a wasteful number, since it uses less digits than its factorization.

815086989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30188416 (or 30188410 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The square root of 815086989 is about 28549.7283524730. The cubic root of 815086989 is about 934.1170953828.

The spelling of 815086989 in words is "eight hundred fifteen million, eighty-six thousand, nine hundred eighty-nine".