868278911 has 6 divisors (see below), whose sum is σ = 907672080. Its totient is φ = 830527148.

The previous prime is 868278883. The next prime is 868278949. The reversal of 868278911 is 119872868.

It is a de Polignac number, because none of the positive numbers 2^k-868278911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 868278911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868278011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 820151 + ... + 821208.

It is an arithmetic number, because the mean of its divisors is an integer number (151278680).

Almost surely, 2^868278911 is an apocalyptic number.

868278911 is a deficient number, since it is larger than the sum of its proper divisors (39393169).

868278911 is a wasteful number, since it uses less digits than its factorization.

868278911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641405 (or 1641382 counting only the distinct ones).

The product of its digits is 387072, while the sum is 50.

The square root of 868278911 is about 29466.5727732290. The cubic root of 868278911 is about 954.0103454555.

The spelling of 868278911 in words is "eight hundred sixty-eight million, two hundred seventy-eight thousand, nine hundred eleven".