859849 has 2 divisors, whose sum is σ = 859850. Its totient is φ = 859848.

The previous prime is 859841. The next prime is 859853. The reversal of 859849 is 948958.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499849 + 360000 = 707^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 859849 - 2³ = 859841 is a prime.

It is not a weakly prime, because it can be changed into another prime (859841) 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, 429924 + 429925.

It is an arithmetic number, because the mean of its divisors is an integer number (429925).

2⁸⁵⁹⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

859849 is a deficient number, since it is larger than the sum of its proper divisors (1).

859849 is an equidigital number, since it uses as much as digits as its factorization.

859849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 43.

The square root of 859849 is about 927.2804322318. The cubic root of 859849 is about 95.0912880587.

The spelling of 859849 in words is "eight hundred fifty-nine thousand, eight hundred forty-nine".