239686394 has 4 divisors (see below), whose sum is σ = 359529594. Its totient is φ = 119843196.

The previous prime is 239686393. The next prime is 239686397. The reversal of 239686394 is 493686932.

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

It can be written as a sum of positive squares in only one way, i.e., 129163225 + 110523169 = 11365^2 + 10513^2 .

It is not an unprimeable number, because it can be changed into a prime (239686393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59921597 + ... + 59921600.

Almost surely, 2^239686394 is an apocalyptic number.

239686394 is a deficient number, since it is larger than the sum of its proper divisors (119843200).

239686394 is a wasteful number, since it uses less digits than its factorization.

239686394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119843199.

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

The square root of 239686394 is about 15481.8084860910. The cubic root of 239686394 is about 621.1757035520.

The spelling of 239686394 in words is "two hundred thirty-nine million, six hundred eighty-six thousand, three hundred ninety-four".