9923849 has 8 divisors (see below), whose sum is σ = 10752840. Its totient is φ = 9158448.

The previous prime is 9923831. The next prime is 9923861. The reversal of 9923849 is 9483299.

9923849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6538249 + 3385600 = 2557^2 + 1840^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9923849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9923819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62 + ... + 4455.

It is an arithmetic number, because the mean of its divisors is an integer number (1344105).

Almost surely, 2^9923849 is an apocalyptic number.

It is an amenable number.

9923849 is a deficient number, since it is larger than the sum of its proper divisors (828991).

9923849 is an equidigital number, since it uses as much as digits as its factorization.

9923849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556 (or 4530 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 9923849 is about 3150.2141197068. The cubic root of 9923849 is about 214.8952004121.

The spelling of 9923849 in words is "nine million, nine hundred twenty-three thousand, eight hundred forty-nine".