866308853 has 2 divisors, whose sum is σ = 866308854. Its totient is φ = 866308852.

The previous prime is 866308847. The next prime is 866308873. The reversal of 866308853 is 358803668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 646023889 + 220284964 = 25417^2 + 14842^2 .

It is a cyclic number.

It is not a de Polignac number, because 866308853 - 2⁴ = 866308837 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 866308798 and 866308807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866308813) 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 as a sum of consecutive naturals, namely, 433154426 + 433154427.

It is an arithmetic number, because the mean of its divisors is an integer number (433154427).

Almost surely, 2^866308853 is an apocalyptic number.

It is an amenable number.

866308853 is a deficient number, since it is larger than the sum of its proper divisors (1).

866308853 is an equidigital number, since it uses as much as digits as its factorization.

866308853 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 866308853 is about 29433.1250974136. The cubic root of 866308853 is about 953.2882737300.

The spelling of 866308853 in words is "eight hundred sixty-six million, three hundred eight thousand, eight hundred fifty-three".