859607081 has 2 divisors, whose sum is σ = 859607082. Its totient is φ = 859607080.

The previous prime is 859607039. The next prime is 859607087. The reversal of 859607081 is 180706958.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 692163481 + 167443600 = 26309^2 + 12940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-859607081 is a prime.

It is a super-2 number, since 2×859607081² = 1477848667410681122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (859607087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429803540 + 429803541.

It is an arithmetic number, because the mean of its divisors is an integer number (429803541).

Almost surely, 2^859607081 is an apocalyptic number.

It is an amenable number.

859607081 is a deficient number, since it is larger than the sum of its proper divisors (1).

859607081 is an equidigital number, since it uses as much as digits as its factorization.

859607081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 859607081 is about 29319.0566185203. The cubic root of 859607081 is about 950.8236922640.

The spelling of 859607081 in words is "eight hundred fifty-nine million, six hundred seven thousand, eighty-one".