9845939 has 2 divisors, whose sum is σ = 9845940. Its totient is φ = 9845938.

The previous prime is 9845917. The next prime is 9845947. The reversal of 9845939 is 9395489.

It is a strong prime.

It is an emirp because it is prime and its reverse (9395489) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9845939 - 2¹⁶ = 9780403 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 9845893 and 9845902.

It is not a weakly prime, because it can be changed into another prime (9845989) 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, 4922969 + 4922970.

It is an arithmetic number, because the mean of its divisors is an integer number (4922970).

Almost surely, 2^9845939 is an apocalyptic number.

9845939 is a deficient number, since it is larger than the sum of its proper divisors (1).

9845939 is an equidigital number, since it uses as much as digits as its factorization.

9845939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 47.

The square root of 9845939 is about 3137.8239275014. The cubic root of 9845939 is about 214.3313569864.

The spelling of 9845939 in words is "nine million, eight hundred forty-five thousand, nine hundred thirty-nine".