859661029 has 2 divisors, whose sum is σ = 859661030. Its totient is φ = 859661028.

The previous prime is 859661017. The next prime is 859661059. The reversal of 859661029 is 920166958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 858372804 + 1288225 = 29298^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 859661029 - 2⁹ = 859660517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 859661029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (859661009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429830514 + 429830515.

It is an arithmetic number, because the mean of its divisors is an integer number (429830515).

Almost surely, 2^859661029 is an apocalyptic number.

It is an amenable number.

859661029 is a deficient number, since it is larger than the sum of its proper divisors (1).

859661029 is an equidigital number, since it uses as much as digits as its factorization.

859661029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 859661029 is about 29319.9766200452. The cubic root of 859661029 is about 950.8435827328.

The spelling of 859661029 in words is "eight hundred fifty-nine million, six hundred sixty-one thousand, twenty-nine".