858943 has 2 divisors, whose sum is σ = 858944. Its totient is φ = 858942.

The previous prime is 858931. The next prime is 858953. The reversal of 858943 is 349858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 858943 - 2⁵ = 858911 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (858953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429471 + 429472.

It is an arithmetic number, because the mean of its divisors is an integer number (429472).

2⁸⁵⁸⁹⁴³ is an apocalyptic number.

858943 is a deficient number, since it is larger than the sum of its proper divisors (1).

858943 is an equidigital number, since it uses as much as digits as its factorization.

858943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 858943 is about 926.7917781249. The cubic root of 858943 is about 95.0578779353.

The spelling of 858943 in words is "eight hundred fifty-eight thousand, nine hundred forty-three".