859109 has 2 divisors, whose sum is σ = 859110. Its totient is φ = 859108.

The previous prime is 859093. The next prime is 859121. The reversal of 859109 is 901958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 850084 + 9025 = 922^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 859109 - 2⁴ = 859093 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429554 + 429555.

It is an arithmetic number, because the mean of its divisors is an integer number (429555).

2⁸⁵⁹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

859109 is a deficient number, since it is larger than the sum of its proper divisors (1).

859109 is an equidigital number, since it uses as much as digits as its factorization.

859109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 32.

The square root of 859109 is about 926.8813300526. The cubic root of 859109 is about 95.0640011942.

Subtracting 859109 from its reverse (901958), we obtain a square (42849 = 207²).

The spelling of 859109 in words is "eight hundred fifty-nine thousand, one hundred nine".