859261289 has 2 divisors, whose sum is σ = 859261290. Its totient is φ = 859261288.

The previous prime is 859261261. The next prime is 859261321. The reversal of 859261289 is 982162958.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748843225 + 110418064 = 27365^2 + 10508^2 .

It is a cyclic number.

It is not a de Polignac number, because 859261289 - 2⁸ = 859261033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (859261489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 429630644 + 429630645.

It is an arithmetic number, because the mean of its divisors is an integer number (429630645).

Almost surely, 2^859261289 is an apocalyptic number.

It is an amenable number.

859261289 is a deficient number, since it is larger than the sum of its proper divisors (1).

859261289 is an equidigital number, since it uses as much as digits as its factorization.

859261289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 622080, while the sum is 50.

The square root of 859261289 is about 29313.1589734031. The cubic root of 859261289 is about 950.6961800047.

The spelling of 859261289 in words is "eight hundred fifty-nine million, two hundred sixty-one thousand, two hundred eighty-nine".