860859409 has 2 divisors, whose sum is σ = 860859410. Its totient is φ = 860859408.

The previous prime is 860859407. The next prime is 860859457. The reversal of 860859409 is 904958068.

It is a happy number.

860859409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 770229009 + 90630400 = 27753^2 + 9520^2 .

It is a cyclic number.

It is not a de Polignac number, because 860859409 - 2¹ = 860859407 is a prime.

Together with 860859407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (860859401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430429704 + 430429705.

It is an arithmetic number, because the mean of its divisors is an integer number (430429705).

Almost surely, 2^860859409 is an apocalyptic number.

It is an amenable number.

860859409 is a deficient number, since it is larger than the sum of its proper divisors (1).

860859409 is an equidigital number, since it uses as much as digits as its factorization.

860859409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 49.

The square root of 860859409 is about 29340.4057402075. The cubic root of 860859409 is about 951.2852075220.

The spelling of 860859409 in words is "eight hundred sixty million, eight hundred fifty-nine thousand, four hundred nine".