9865005673 has 2 divisors, whose sum is σ = 9865005674. Its totient is φ = 9865005672.

The previous prime is 9865005589. The next prime is 9865005727. The reversal of 9865005673 is 3765005689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5301732969 + 4563272704 = 72813^2 + 67552^2 .

It is a cyclic number.

It is not a de Polignac number, because 9865005673 - 2¹³ = 9864997481 is a prime.

It is not a weakly prime, because it can be changed into another prime (9865095673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4932502836 + 4932502837.

It is an arithmetic number, because the mean of its divisors is an integer number (4932502837).

Almost surely, 2^9865005673 is an apocalyptic number.

It is an amenable number.

9865005673 is a deficient number, since it is larger than the sum of its proper divisors (1).

9865005673 is an equidigital number, since it uses as much as digits as its factorization.

9865005673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The square root of 9865005673 is about 99322.7349250915. The cubic root of 9865005673 is about 2144.6961875571.

The spelling of 9865005673 in words is "nine billion, eight hundred sixty-five million, five thousand, six hundred seventy-three".