239131689 has 8 divisors (see below), whose sum is σ = 320177280. Its totient is φ = 158753616.

The previous prime is 239131679. The next prime is 239131691. The reversal of 239131689 is 986131932.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 239131689 - 2⁸ = 239131433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 239131689.

It is not an unprimeable number, because it can be changed into a prime (239131609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166042 + ... + 167475.

It is an arithmetic number, because the mean of its divisors is an integer number (40022160).

Almost surely, 2^239131689 is an apocalyptic number.

It is an amenable number.

239131689 is a deficient number, since it is larger than the sum of its proper divisors (81045591).

239131689 is a wasteful number, since it uses less digits than its factorization.

239131689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333759.

The product of its digits is 69984, while the sum is 42.

The square root of 239131689 is about 15463.8833738489. The cubic root of 239131689 is about 620.6961388219.

The spelling of 239131689 in words is "two hundred thirty-nine million, one hundred thirty-one thousand, six hundred eighty-nine".