858223 has 2 divisors, whose sum is σ = 858224. Its totient is φ = 858222.

The previous prime is 858217. The next prime is 858233. The reversal of 858223 is 322858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 858223 - 2⁹ = 857711 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 858191 and 858200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858233) 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 as a sum of consecutive naturals, namely, 429111 + 429112.

It is an arithmetic number, because the mean of its divisors is an integer number (429112).

2⁸⁵⁸²²³ is an apocalyptic number.

858223 is a deficient number, since it is larger than the sum of its proper divisors (1).

858223 is an equidigital number, since it uses as much as digits as its factorization.

858223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 28.

The square root of 858223 is about 926.4032599252. The cubic root of 858223 is about 95.0313100860.

It can be divided in two parts, 858 and 223, that added together give a triangular number (1081 = T₄₆).

The spelling of 858223 in words is "eight hundred fifty-eight thousand, two hundred twenty-three".