9999841 has 4 divisors (see below), whose sum is σ = 10030384. Its totient is φ = 9969300.

The previous prime is 9999823. The next prime is 9999863. The reversal of 9999841 is 1489999.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9999841 - 2⁷ = 9999713 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9919841) 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 in 3 ways as a sum of consecutive naturals, for example, 14775 + ... + 15436.

It is an arithmetic number, because the mean of its divisors is an integer number (2507596).

Almost surely, 2^9999841 is an apocalyptic number.

It is an amenable number.

9999841 is a deficient number, since it is larger than the sum of its proper divisors (30543).

9999841 is a wasteful number, since it uses less digits than its factorization.

9999841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30542.

The product of its digits is 209952, while the sum is 49.

The square root of 9999841 is about 3162.2525199610. The cubic root of 9999841 is about 215.4423271468.

The spelling of 9999841 in words is "nine million, nine hundred ninety-nine thousand, eight hundred forty-one".