239935864789 has 4 divisors (see below), whose sum is σ = 239937298956. Its totient is φ = 239934430624.

The previous prime is 239935864757. The next prime is 239935864841. The reversal of 239935864789 is 987468539932.

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 30705552900 + 209230311889 = 175230^2 + 457417^2 .

It is a cyclic number.

It is not a de Polignac number, because 239935864789 - 2⁵ = 239935864757 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 (239935864739) 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, 427024 + ... + 813769.

It is an arithmetic number, because the mean of its divisors is an integer number (59984324739).

Almost surely, 2^239935864789 is an apocalyptic number.

It is an amenable number.

239935864789 is a deficient number, since it is larger than the sum of its proper divisors (1434167).

239935864789 is a wasteful number, since it uses less digits than its factorization.

239935864789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434166.

The product of its digits is 705438720, while the sum is 73.

The spelling of 239935864789 in words is "two hundred thirty-nine billion, nine hundred thirty-five million, eight hundred sixty-four thousand, seven hundred eighty-nine".