923320009 has 4 divisors (see below), whose sum is σ = 955158660. Its totient is φ = 891481360.

The previous prime is 923320007. The next prime is 923320039. The reversal of 923320009 is 900023329.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900023329 = 13781 ⋅65309.

It can be written as a sum of positive squares in 2 ways, for example, as 226201600 + 697118409 = 15040^2 + 26403^2 .

It is a cyclic number.

It is not a de Polignac number, because 923320009 - 2¹ = 923320007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (923320007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15919282 + ... + 15919339.

It is an arithmetic number, because the mean of its divisors is an integer number (238789665).

Almost surely, 2^923320009 is an apocalyptic number.

It is an amenable number.

923320009 is a deficient number, since it is larger than the sum of its proper divisors (31838651).

923320009 is a wasteful number, since it uses less digits than its factorization.

923320009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31838650.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 923320009 is about 30386.1812177838. The cubic root of 923320009 is about 973.7573505850.

The spelling of 923320009 in words is "nine hundred twenty-three million, three hundred twenty thousand, nine".