239974393 has 4 divisors (see below), whose sum is σ = 240007680. Its totient is φ = 239941108.

The previous prime is 239974337. The next prime is 239974409. The reversal of 239974393 is 393479932.

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 a de Polignac number, because none of the positive numbers 2^k-239974393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (239974303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 805 + ... + 21922.

It is an arithmetic number, because the mean of its divisors is an integer number (60001920).

Almost surely, 2^239974393 is an apocalyptic number.

It is an amenable number.

239974393 is a deficient number, since it is larger than the sum of its proper divisors (33287).

239974393 is a wasteful number, since it uses less digits than its factorization.

239974393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33286.

The product of its digits is 1102248, while the sum is 49.

The square root of 239974393 is about 15491.1069004122. The cubic root of 239974393 is about 621.4243984872.

The spelling of 239974393 in words is "two hundred thirty-nine million, nine hundred seventy-four thousand, three hundred ninety-three".