859661027 has 4 divisors (see below), whose sum is σ = 861188520. Its totient is φ = 858133536.

The previous prime is 859661017. The next prime is 859661029. The reversal of 859661027 is 720166958.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 859661027 - 2²⁸ = 591225571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859661029) 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 in 3 ways as a sum of consecutive naturals, for example, 762902 + ... + 764027.

It is an arithmetic number, because the mean of its divisors is an integer number (215297130).

Almost surely, 2^859661027 is an apocalyptic number.

859661027 is a deficient number, since it is larger than the sum of its proper divisors (1527493).

859661027 is a wasteful number, since it uses less digits than its factorization.

859661027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527492.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 859661027 is about 29319.9765859388. The cubic root of 859661027 is about 950.8435819954.

The spelling of 859661027 in words is "eight hundred fifty-nine million, six hundred sixty-one thousand, twenty-seven".