868912857 has 48 divisors (see below), whose sum is σ = 1381266432. Its totient is φ = 523975680.

The previous prime is 868912843. The next prime is 868912873. The reversal of 868912857 is 758219868.

It is not a de Polignac number, because 868912857 - 2⁸ = 868912601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (868912657) 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 47 ways as a sum of consecutive naturals, for example, 791533 + ... + 792629.

It is an arithmetic number, because the mean of its divisors is an integer number (28776384).

Almost surely, 2^868912857 is an apocalyptic number.

It is an amenable number.

868912857 is a deficient number, since it is larger than the sum of its proper divisors (512353575).

868912857 is a wasteful number, since it uses less digits than its factorization.

868912857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1315 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The square root of 868912857 is about 29477.3278470081. The cubic root of 868912857 is about 954.2424689912.

The spelling of 868912857 in words is "eight hundred sixty-eight million, nine hundred twelve thousand, eight hundred fifty-seven".