870289 has 6 divisors (see below), whose sum is σ = 1012434. Its totient is φ = 745920.

The previous prime is 870283. The next prime is 870301. The reversal of 870289 is 982078.

It is a happy number.

870289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 693889 + 176400 = 833^2 + 420^2 .

It is not a de Polignac number, because 870289 - 2⁷ = 870161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8832 + ... + 8929.

It is an arithmetic number, because the mean of its divisors is an integer number (168739).

2⁸⁷⁰²⁸⁹ is an apocalyptic number.

It is an amenable number.

870289 is a deficient number, since it is larger than the sum of its proper divisors (142145).

870289 is a wasteful number, since it uses less digits than its factorization.

870289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17775 (or 17768 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 870289 is about 932.8928127068. The cubic root of 870289 is about 95.4745964612.

The spelling of 870289 in words is "eight hundred seventy thousand, two hundred eighty-nine".