866305093 has 2 divisors, whose sum is σ = 866305094. Its totient is φ = 866305092.

The previous prime is 866305061. The next prime is 866305123. The reversal of 866305093 is 390503668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 569156449 + 297148644 = 23857^2 + 17238^2 .

It is a cyclic number.

It is not a de Polignac number, because 866305093 - 2⁵ = 866305061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866305043) 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, 433152546 + 433152547.

It is an arithmetic number, because the mean of its divisors is an integer number (433152547).

Almost surely, 2^866305093 is an apocalyptic number.

It is an amenable number.

866305093 is a deficient number, since it is larger than the sum of its proper divisors (1).

866305093 is an equidigital number, since it uses as much as digits as its factorization.

866305093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 866305093 is about 29433.0612237327. The cubic root of 866305093 is about 953.2868945571.

The spelling of 866305093 in words is "eight hundred sixty-six million, three hundred five thousand, ninety-three".