243365923 has 4 divisors (see below), whose sum is σ = 244519528. Its totient is φ = 242212320.

The previous prime is 243365911. The next prime is 243365957. The reversal of 243365923 is 329563342.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243365923 - 2⁹ = 243365411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243365963) 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, 576486 + ... + 576907.

It is an arithmetic number, because the mean of its divisors is an integer number (61129882).

Almost surely, 2^243365923 is an apocalyptic number.

243365923 is a deficient number, since it is larger than the sum of its proper divisors (1153605).

243365923 is a wasteful number, since it uses less digits than its factorization.

243365923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153604.

The product of its digits is 116640, while the sum is 37.

The square root of 243365923 is about 15600.1898385885. The cubic root of 243365923 is about 624.3382204839.

The spelling of 243365923 in words is "two hundred forty-three million, three hundred sixty-five thousand, nine hundred twenty-three".