868886857 has 4 divisors (see below), whose sum is σ = 870656976. Its totient is φ = 867116740.

The previous prime is 868886839. The next prime is 868886861. The reversal of 868886857 is 758688868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 868886857 - 2⁷ = 868886729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (868886897) 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, 884323 + ... + 885304.

It is an arithmetic number, because the mean of its divisors is an integer number (217664244).

Almost surely, 2^868886857 is an apocalyptic number.

It is an amenable number.

868886857 is a deficient number, since it is larger than the sum of its proper divisors (1770119).

868886857 is a wasteful number, since it uses less digits than its factorization.

868886857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770118.

The product of its digits is 41287680, while the sum is 64.

The square root of 868886857 is about 29476.8868268004. The cubic root of 868886857 is about 954.2329511393.

The spelling of 868886857 in words is "eight hundred sixty-eight million, eight hundred eighty-six thousand, eight hundred fifty-seven".