9999849 has 4 divisors (see below), whose sum is σ = 13333136. Its totient is φ = 6666564.

The previous prime is 9999823. The next prime is 9999863. The reversal of 9999849 is 9489999.

9999849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 9999849 - 2⁸ = 9999593 is a prime.

It is a Duffinian number.

9999849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9999889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1666639 + ... + 1666644.

It is an arithmetic number, because the mean of its divisors is an integer number (3333284).

Almost surely, 2^9999849 is an apocalyptic number.

It is an amenable number.

9999849 is a deficient number, since it is larger than the sum of its proper divisors (3333287).

9999849 is a wasteful number, since it uses less digits than its factorization.

9999849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333286.

The product of its digits is 1889568, while the sum is 57.

The square root of 9999849 is about 3162.2537848819. The cubic root of 9999849 is about 215.4423845989.

The spelling of 9999849 in words is "nine million, nine hundred ninety-nine thousand, eight hundred forty-nine".