868231279 has 4 divisors (see below), whose sum is σ = 868556376. Its totient is φ = 867906184.

The previous prime is 868231253. The next prime is 868231289. The reversal of 868231279 is 972132868.

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

It is a cyclic number.

It is not a de Polignac number, because 868231279 - 2²¹ = 866134127 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 (868231219) 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, 158509 + ... + 163894.

It is an arithmetic number, because the mean of its divisors is an integer number (217139094).

Almost surely, 2^868231279 is an apocalyptic number.

868231279 is a deficient number, since it is larger than the sum of its proper divisors (325097).

868231279 is a wasteful number, since it uses less digits than its factorization.

868231279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325096.

The product of its digits is 290304, while the sum is 46.

The square root of 868231279 is about 29465.7645242746. The cubic root of 868231279 is about 953.9929001196.

The spelling of 868231279 in words is "eight hundred sixty-eight million, two hundred thirty-one thousand, two hundred seventy-nine".