239678109 has 20 divisors (see below), whose sum is σ = 390588000. Its totient is φ = 145258920.

The previous prime is 239678099. The next prime is 239678111. The reversal of 239678109 is 901876932.

239678109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 239678109 - 2⁷ = 239677981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239678149) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 133609 + ... + 135390.

It is an arithmetic number, because the mean of its divisors is an integer number (19529400).

Almost surely, 2^239678109 is an apocalyptic number.

It is an amenable number.

239678109 is a deficient number, since it is larger than the sum of its proper divisors (150909891).

239678109 is a wasteful number, since it uses less digits than its factorization.

239678109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269022 (or 269013 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 239678109 is about 15481.5409116793. The cubic root of 239678109 is about 621.1685462830.

The spelling of 239678109 in words is "two hundred thirty-nine million, six hundred seventy-eight thousand, one hundred nine".