905863 has 16 divisors (see below), whose sum is σ = 1120000. Its totient is φ = 730296.

The previous prime is 905843. The next prime is 905897. The reversal of 905863 is 368509.

It is not a de Polignac number, because 905863 - 2¹³ = 897671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6448 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (70000).

2⁹⁰⁵⁸⁶³ is an apocalyptic number.

905863 is a deficient number, since it is larger than the sum of its proper divisors (214137).

905863 is a wasteful number, since it uses less digits than its factorization.

905863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 905863 is about 951.7683541703. The cubic root of 905863 is about 96.7581390727.

The spelling of 905863 in words is "nine hundred five thousand, eight hundred sixty-three".