855863 has 2 divisors, whose sum is σ = 855864. Its totient is φ = 855862.

The previous prime is 855857. The next prime is 855887. The reversal of 855863 is 368558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 855863 - 2⁸ = 855607 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 855863.

It is not a weakly prime, because it can be changed into another prime (851863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427931 + 427932.

It is an arithmetic number, because the mean of its divisors is an integer number (427932).

2⁸⁵⁵⁸⁶³ is an apocalyptic number.

855863 is a deficient number, since it is larger than the sum of its proper divisors (1).

855863 is an equidigital number, since it uses as much as digits as its factorization.

855863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 35.

The square root of 855863 is about 925.1286397037. The cubic root of 855863 is about 94.9441222646.

The spelling of 855863 in words is "eight hundred fifty-five thousand, eight hundred sixty-three".