239668493 has 4 divisors (see below), whose sum is σ = 245514108. Its totient is φ = 233822880.

The previous prime is 239668469. The next prime is 239668529. The reversal of 239668493 is 394866932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47513449 + 192155044 = 6893^2 + 13862^2 .

It is a cyclic number.

It is not a de Polignac number, because 239668493 - 2¹⁰ = 239667469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239661493) 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, 2922746 + ... + 2922827.

It is an arithmetic number, because the mean of its divisors is an integer number (61378527).

Almost surely, 2^239668493 is an apocalyptic number.

It is an amenable number.

239668493 is a deficient number, since it is larger than the sum of its proper divisors (5845615).

239668493 is an equidigital number, since it uses as much as digits as its factorization.

239668493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5845614.

The product of its digits is 1679616, while the sum is 50.

The square root of 239668493 is about 15481.2303451631. The cubic root of 239668493 is about 621.1602389792.

The spelling of 239668493 in words is "two hundred thirty-nine million, six hundred sixty-eight thousand, four hundred ninety-three".