868736143 has 4 divisors (see below), whose sum is σ = 947712168. Its totient is φ = 789760120.

The previous prime is 868736129. The next prime is 868736161. The reversal of 868736143 is 341637868.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-868736143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 868736093 and 868736102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868736173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39487996 + ... + 39488017.

It is an arithmetic number, because the mean of its divisors is an integer number (236928042).

Almost surely, 2^868736143 is an apocalyptic number.

868736143 is a deficient number, since it is larger than the sum of its proper divisors (78976025).

868736143 is a wasteful number, since it uses less digits than its factorization.

868736143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78976024.

The product of its digits is 580608, while the sum is 46.

The square root of 868736143 is about 29474.3302383617. The cubic root of 868736143 is about 954.1777753398.

The spelling of 868736143 in words is "eight hundred sixty-eight million, seven hundred thirty-six thousand, one hundred forty-three".