923993909 has 2 divisors, whose sum is σ = 923993910. Its totient is φ = 923993908.

The previous prime is 923993893. The next prime is 923993951. The reversal of 923993909 is 909399329.

923993909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 723771409 + 200222500 = 26903^2 + 14150^2 .

It is an emirp because it is prime and its reverse (909399329) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 923993909 - 2⁴ = 923993893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (923993989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 461996954 + 461996955.

It is an arithmetic number, because the mean of its divisors is an integer number (461996955).

Almost surely, 2^923993909 is an apocalyptic number.

It is an amenable number.

923993909 is a deficient number, since it is larger than the sum of its proper divisors (1).

923993909 is an equidigital number, since it uses as much as digits as its factorization.

923993909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1062882, while the sum is 53.

The square root of 923993909 is about 30397.2681173819. The cubic root of 923993909 is about 973.9941971413.

The spelling of 923993909 in words is "nine hundred twenty-three million, nine hundred ninety-three thousand, nine hundred nine".