239669393 has 4 divisors (see below), whose sum is σ = 239700480. Its totient is φ = 239638308.

The previous prime is 239669377. The next prime is 239669399. The reversal of 239669393 is 393966932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 239669393 - 2⁴ = 239669377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (239669399) 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, 5696 + ... + 22622.

It is an arithmetic number, because the mean of its divisors is an integer number (59925120).

Almost surely, 2^239669393 is an apocalyptic number.

It is an amenable number.

239669393 is a deficient number, since it is larger than the sum of its proper divisors (31087).

239669393 is a wasteful number, since it uses less digits than its factorization.

239669393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31086.

The product of its digits is 1417176, while the sum is 50.

The square root of 239669393 is about 15481.2594125930. The cubic root of 239669393 is about 621.1610165025.

The spelling of 239669393 in words is "two hundred thirty-nine million, six hundred sixty-nine thousand, three hundred ninety-three".