860646089 has 2 divisors, whose sum is σ = 860646090. Its totient is φ = 860646088.

The previous prime is 860646049. The next prime is 860646091. The reversal of 860646089 is 980646068.

860646089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 766846864 + 93799225 = 27692^2 + 9685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-860646089 is a prime.

It is a Sophie Germain prime.

Together with 860646091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (860646019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430323044 + 430323045.

It is an arithmetic number, because the mean of its divisors is an integer number (430323045).

Almost surely, 2^860646089 is an apocalyptic number.

It is an amenable number.

860646089 is a deficient number, since it is larger than the sum of its proper divisors (1).

860646089 is an equidigital number, since it uses as much as digits as its factorization.

860646089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 47.

The square root of 860646089 is about 29336.7702550911. The cubic root of 860646089 is about 951.2066252268.

The spelling of 860646089 in words is "eight hundred sixty million, six hundred forty-six thousand, eighty-nine".