9866449 has 2 divisors, whose sum is σ = 9866450. Its totient is φ = 9866448.

The previous prime is 9866431. The next prime is 9866489. The reversal of 9866449 is 9446689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8880400 + 986049 = 2980^2 + 993^2 .

It is a cyclic number.

It is not a de Polignac number, because 9866449 - 2⁹ = 9865937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 9866399 and 9866408.

It is not a weakly prime, because it can be changed into another prime (9866419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4933224 + 4933225.

It is an arithmetic number, because the mean of its divisors is an integer number (4933225).

Almost surely, 2^9866449 is an apocalyptic number.

It is an amenable number.

9866449 is a deficient number, since it is larger than the sum of its proper divisors (1).

9866449 is an equidigital number, since it uses as much as digits as its factorization.

9866449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 9866449 is about 3141.0904157633. The cubic root of 9866449 is about 214.4800777697.

The spelling of 9866449 in words is "nine million, eight hundred sixty-six thousand, four hundred forty-nine".