857000689 has 2 divisors, whose sum is σ = 857000690. Its totient is φ = 857000688.

The previous prime is 857000659. The next prime is 857000713. The reversal of 857000689 is 986000758.

It is a happy number.

857000689 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., 821395600 + 35605089 = 28660^2 + 5967^2 .

It is a cyclic number.

It is not a de Polignac number, because 857000689 - 2¹⁵ = 856967921 is a prime.

It is a super-3 number, since 3×857000689³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (857000659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428500344 + 428500345.

It is an arithmetic number, because the mean of its divisors is an integer number (428500345).

Almost surely, 2^857000689 is an apocalyptic number.

It is an amenable number.

857000689 is a deficient number, since it is larger than the sum of its proper divisors (1).

857000689 is an equidigital number, since it uses as much as digits as its factorization.

857000689 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 43.

The square root of 857000689 is about 29274.5741045024. The cubic root of 857000689 is about 949.8617301994.

The spelling of 857000689 in words is "eight hundred fifty-seven million, six hundred eighty-nine", and thus it is an aban number.