99999849 has 4 divisors (see below), whose sum is σ = 133333136. Its totient is φ = 66666564.

The previous prime is 99999847. The next prime is 99999931. The reversal of 99999849 is 94899999.

It is a happy number.

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 99999849 - 2¹ = 99999847 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99999849.

It is not an unprimeable number, because it can be changed into a prime (99999847) 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, 16666639 + ... + 16666644.

It is an arithmetic number, because the mean of its divisors is an integer number (33333284).

Almost surely, 2^99999849 is an apocalyptic number.

It is an amenable number.

99999849 is a deficient number, since it is larger than the sum of its proper divisors (33333287).

99999849 is a wasteful number, since it uses less digits than its factorization.

99999849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333286.

The product of its digits is 17006112, while the sum is 66.

The square root of 99999849 is about 9999.9924499971. The cubic root of 99999849 is about 464.1586497345.

The spelling of 99999849 in words is "ninety-nine million, nine hundred ninety-nine thousand, eight hundred forty-nine".