859853 has 2 divisors, whose sum is σ = 859854. Its totient is φ = 859852.

The previous prime is 859849. The next prime is 859861. The reversal of 859853 is 358958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 702244 + 157609 = 838^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 859853 - 2² = 859849 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429926 + 429927.

It is an arithmetic number, because the mean of its divisors is an integer number (429927).

2⁸⁵⁹⁸⁵³ is an apocalyptic number.

It is an amenable number.

859853 is a deficient number, since it is larger than the sum of its proper divisors (1).

859853 is an equidigital number, since it uses as much as digits as its factorization.

859853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 38.

The square root of 859853 is about 927.2825890741. The cubic root of 859853 is about 95.0914355127.

The spelling of 859853 in words is "eight hundred fifty-nine thousand, eight hundred fifty-three".