239669243 has 4 divisors (see below), whose sum is σ = 261457368. Its totient is φ = 217881120.

The previous prime is 239669219. The next prime is 239669291. The reversal of 239669243 is 342966932.

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 239669243 - 2¹² = 239665147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 239669194 and 239669203.

It is not an unprimeable number, because it can be changed into a prime (239668243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10894046 + ... + 10894067.

It is an arithmetic number, because the mean of its divisors is an integer number (65364342).

Almost surely, 2^239669243 is an apocalyptic number.

239669243 is a deficient number, since it is larger than the sum of its proper divisors (21788125).

239669243 is a wasteful number, since it uses less digits than its factorization.

239669243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21788124.

The product of its digits is 419904, while the sum is 44.

The square root of 239669243 is about 15481.2545680252. The cubic root of 239669243 is about 621.1608869154.

The spelling of 239669243 in words is "two hundred thirty-nine million, six hundred sixty-nine thousand, two hundred forty-three".