869022009 has 12 divisors (see below), whose sum is σ = 1257033700. Its totient is φ = 578526624.

The previous prime is 869022001. The next prime is 869022029. The reversal of 869022009 is 900220968.

It can be written as a sum of positive squares in 2 ways, for example, as 318087225 + 550934784 = 17835^2 + 23472^2 .

It is not a de Polignac number, because 869022009 - 2³ = 869022001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (869022001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61714 + ... + 74475.

Almost surely, 2^869022009 is an apocalyptic number.

It is an amenable number.

869022009 is a deficient number, since it is larger than the sum of its proper divisors (388011691).

869022009 is a wasteful number, since it uses less digits than its factorization.

869022009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136904 (or 136901 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 869022009 is about 29479.1792456981. The cubic root of 869022009 is about 954.2824243263.

The spelling of 869022009 in words is "eight hundred sixty-nine million, twenty-two thousand, nine".