859923 has 8 divisors (see below), whose sum is σ = 1274000. Its totient is φ = 573264.

The previous prime is 859919. The next prime is 859927. The reversal of 859923 is 329958.

It is an interprime number because it is at equal distance from previous prime (859919) and next prime (859927).

It is not a de Polignac number, because 859923 - 2² = 859919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859927) 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 7 ways as a sum of consecutive naturals, for example, 15898 + ... + 15951.

It is an arithmetic number, because the mean of its divisors is an integer number (159250).

2⁸⁵⁹⁹²³ is an apocalyptic number.

859923 is a deficient number, since it is larger than the sum of its proper divisors (414077).

859923 is a wasteful number, since it uses less digits than its factorization.

859923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31858 (or 31852 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 859923 is about 927.3203330026. The cubic root of 859923 is about 95.0940158839.

The spelling of 859923 in words is "eight hundred fifty-nine thousand, nine hundred twenty-three".