869089 has 4 divisors (see below), whose sum is σ = 935956. Its totient is φ = 802224.

The previous prime is 869081. The next prime is 869119. The reversal of 869089 is 980968.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 547600 + 321489 = 740^2 + 567^2 .

It is a cyclic number.

It is not a de Polignac number, because 869089 - 2³ = 869081 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33414 + ... + 33439.

It is an arithmetic number, because the mean of its divisors is an integer number (233989).

2⁸⁶⁹⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

869089 is a deficient number, since it is larger than the sum of its proper divisors (66867).

869089 is a wasteful number, since it uses less digits than its factorization.

869089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66866.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 869089 is about 932.2494301420. The cubic root of 869089 is about 95.4306944876.

The spelling of 869089 in words is "eight hundred sixty-nine thousand, eighty-nine".