869109505 has 16 divisors (see below), whose sum is σ = 1146057984. Its totient is φ = 627460480.

The previous prime is 869109503. The next prime is 869109511. The reversal of 869109505 is 505901968.

It is a happy number.

869109505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 869109505 - 2¹ = 869109503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869109503) 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, 50137 + ... + 65206.

It is an arithmetic number, because the mean of its divisors is an integer number (71628624).

Almost surely, 2^869109505 is an apocalyptic number.

It is an amenable number.

869109505 is a deficient number, since it is larger than the sum of its proper divisors (276948479).

869109505 is a wasteful number, since it uses less digits than its factorization.

869109505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115496.

The product of its (nonzero) digits is 97200, while the sum is 43.

The square root of 869109505 is about 29480.6632388079. The cubic root of 869109505 is about 954.3144500180.

The spelling of 869109505 in words is "eight hundred sixty-nine million, one hundred nine thousand, five hundred five".