9120823009 has 9 divisors (see below), whose sum is σ = 9342074259. Its totient is φ = 8904699720.

The previous prime is 9120823001. The next prime is 9120823027. The reversal of 9120823009 is 9003280219.

The square root of 9120823009 is 95503.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6185350609 + 2935472400 = 78647^2 + 54180^2 .

It is not a de Polignac number, because 9120823009 - 2³ = 9120823001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9120823001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4105519 + ... + 4107739.

It is an arithmetic number, because the mean of its divisors is an integer number (1038008251).

Almost surely, 2^9120823009 is an apocalyptic number.

9120823009 is the 95503-rd square number.

9120823009 is the 47752-nd centered octagonal number.

It is an amenable number.

9120823009 is a deficient number, since it is larger than the sum of its proper divisors (221251250).

9120823009 is an frugal number, since it uses more digits than its factorization.

9120823009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528 (or 2264 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The cubic root of 9120823009 is about 2089.3506990754.

The spelling of 9120823009 in words is "nine billion, one hundred twenty million, eight hundred twenty-three thousand, nine".