815089 has 4 divisors (see below), whose sum is σ = 889200. Its totient is φ = 740980.

The previous prime is 815063. The next prime is 815123. The reversal of 815089 is 980518.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 815089 - 2⁹ = 814577 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 815089.

It is not an unprimeable number, because it can be changed into a prime (815029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37039 + ... + 37060.

It is an arithmetic number, because the mean of its divisors is an integer number (222300).

2⁸¹⁵⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

815089 is a deficient number, since it is larger than the sum of its proper divisors (74111).

815089 is a wasteful number, since it uses less digits than its factorization.

815089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74110.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 815089 is about 902.8227954588. The cubic root of 815089 is about 93.4117863607.

The spelling of 815089 in words is "eight hundred fifteen thousand, eighty-nine".