857863 has 4 divisors (see below), whose sum is σ = 885568. Its totient is φ = 830160.

The previous prime is 857851. The next prime is 857867. The reversal of 857863 is 368758.

857863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-857863 is a prime.

It is a d-powerful number, because it can be written as 8 + 5 + 8⁵ + 7⁷ + 6⁴ + 3⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857867) 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, 13806 + ... + 13867.

It is an arithmetic number, because the mean of its divisors is an integer number (221392).

2⁸⁵⁷⁸⁶³ is an apocalyptic number.

857863 is a deficient number, since it is larger than the sum of its proper divisors (27705).

857863 is a wasteful number, since it uses less digits than its factorization.

857863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27704.

The product of its digits is 40320, while the sum is 37.

The square root of 857863 is about 926.2089397107. The cubic root of 857863 is about 95.0180205888.

The spelling of 857863 in words is "eight hundred fifty-seven thousand, eight hundred sixty-three".