869105289 has 16 divisors (see below), whose sum is σ = 1271495232. Its totient is φ = 524741568.

The previous prime is 869105257. The next prime is 869105327. The reversal of 869105289 is 982501968.

It is a happy number.

It is not a de Polignac number, because 869105289 - 2⁵ = 869105257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (869105219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208167 + ... + 212300.

It is an arithmetic number, because the mean of its divisors is an integer number (79468452).

Almost surely, 2^869105289 is an apocalyptic number.

It is an amenable number.

869105289 is a deficient number, since it is larger than the sum of its proper divisors (402389943).

869105289 is a wasteful number, since it uses less digits than its factorization.

869105289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420536.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 869105289 is about 29480.5917342241. The cubic root of 869105289 is about 954.3129069074.

The spelling of 869105289 in words is "eight hundred sixty-nine million, one hundred five thousand, two hundred eighty-nine".