868316391 has 12 divisors (see below), whose sum is σ = 1259118432. Its totient is φ = 576623616.

The previous prime is 868316381. The next prime is 868316411. The reversal of 868316391 is 193613868.

It is a happy number.

868316391 is a `hidden beast` number, since 8 + 6 + 8 + 3 + 1 + 639 + 1 = 666.

It is not a de Polignac number, because 868316391 - 2⁹ = 868315879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868316381) 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 11 ways as a sum of consecutive naturals, for example, 185391 + ... + 190016.

It is an arithmetic number, because the mean of its divisors is an integer number (104926536).

Almost surely, 2^868316391 is an apocalyptic number.

868316391 is a deficient number, since it is larger than the sum of its proper divisors (390802041).

868316391 is a wasteful number, since it uses less digits than its factorization.

868316391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375670 (or 375667 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 868316391 is about 29467.2087412432. The cubic root of 868316391 is about 954.0240721481.

The spelling of 868316391 in words is "eight hundred sixty-eight million, three hundred sixteen thousand, three hundred ninety-one".