859609 has 2 divisors, whose sum is σ = 859610. Its totient is φ = 859608.

The previous prime is 859603. The next prime is 859619. The reversal of 859609 is 906958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 760384 + 99225 = 872^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 859609 - 2³ = 859601 is a prime.

It is not a weakly prime, because it can be changed into another prime (859601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429804 + 429805.

It is an arithmetic number, because the mean of its divisors is an integer number (429805).

2⁸⁵⁹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

859609 is a deficient number, since it is larger than the sum of its proper divisors (1).

859609 is an equidigital number, since it uses as much as digits as its factorization.

859609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 859609 is about 927.1510125109. The cubic root of 859609 is about 95.0824399808.

The spelling of 859609 in words is "eight hundred fifty-nine thousand, six hundred nine".