239306243 has 4 divisors (see below), whose sum is σ = 261061368. Its totient is φ = 217551120.

The previous prime is 239306239. The next prime is 239306251. The reversal of 239306243 is 342603932.

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 239306243 - 2² = 239306239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239306203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10877546 + ... + 10877567.

It is an arithmetic number, because the mean of its divisors is an integer number (65265342).

Almost surely, 2^239306243 is an apocalyptic number.

239306243 is a deficient number, since it is larger than the sum of its proper divisors (21755125).

239306243 is a wasteful number, since it uses less digits than its factorization.

239306243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21755124.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 239306243 is about 15469.5262694111. The cubic root of 239306243 is about 620.8471276527.

The spelling of 239306243 in words is "two hundred thirty-nine million, three hundred six thousand, two hundred forty-three".