869254209 has 24 divisors (see below), whose sum is σ = 1310694632. Its totient is φ = 554584320.

The previous prime is 869254201. The next prime is 869254213. The reversal of 869254209 is 902452968.

869254209 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 4 ways, for example, as 91011600 + 778242609 = 9540^2 + 27897^2 .

It is not a de Polignac number, because 869254209 - 2³ = 869254201 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (869254201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1084 + ... + 41709.

Almost surely, 2^869254209 is an apocalyptic number.

It is an amenable number.

869254209 is a deficient number, since it is larger than the sum of its proper divisors (441440423).

869254209 is a wasteful number, since it uses less digits than its factorization.

869254209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42897 (or 42894 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 869254209 is about 29483.1173555308. The cubic root of 869254209 is about 954.3674105307.

The spelling of 869254209 in words is "eight hundred sixty-nine million, two hundred fifty-four thousand, two hundred nine".