9866573 has 2 divisors, whose sum is σ = 9866574. Its totient is φ = 9866572.

The previous prime is 9866561. The next prime is 9866581. The reversal of 9866573 is 3756689.

9866573 is digitally balanced in base 2 and base 3, because in such bases 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., 9223369 + 643204 = 3037^2 + 802^2 .

It is a cyclic number.

It is not a de Polignac number, because 9866573 - 2⁴ = 9866557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9866513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4933286 + 4933287.

It is an arithmetic number, because the mean of its divisors is an integer number (4933287).

Almost surely, 2^9866573 is an apocalyptic number.

It is an amenable number.

9866573 is a deficient number, since it is larger than the sum of its proper divisors (1).

9866573 is an equidigital number, since it uses as much as digits as its factorization.

9866573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 9866573 is about 3141.1101540697. The cubic root of 9866573 is about 214.4809762834.

The spelling of 9866573 in words is "nine million, eight hundred sixty-six thousand, five hundred seventy-three".