99823985 has 8 divisors (see below), whose sum is σ = 119987880. Its totient is φ = 79726464.

The previous prime is 99823981. The next prime is 99823987. The reversal of 99823985 is 58932899.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7529536 + 92294449 = 2744^2 + 9607^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99823985 - 2² = 99823981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99823981) 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, 13220 + ... + 19349.

It is an arithmetic number, because the mean of its divisors is an integer number (14998485).

Almost surely, 2^99823985 is an apocalyptic number.

It is an amenable number.

99823985 is a deficient number, since it is larger than the sum of its proper divisors (20163895).

99823985 is a wasteful number, since it uses less digits than its factorization.

99823985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33187.

The product of its digits is 1399680, while the sum is 53.

The square root of 99823985 is about 9991.1953739280. The cubic root of 99823985 is about 463.8863936716.

The spelling of 99823985 in words is "ninety-nine million, eight hundred twenty-three thousand, nine hundred eighty-five".