99649173 has 16 divisors (see below), whose sum is σ = 145435136. Its totient is φ = 60315840.

The previous prime is 99649157. The next prime is 99649183. The reversal of 99649173 is 37194699.

It is not a de Polignac number, because 99649173 - 2⁴ = 99649157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99649183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18565 + ... + 23322.

It is an arithmetic number, because the mean of its divisors is an integer number (9089696).

Almost surely, 2^99649173 is an apocalyptic number.

It is an amenable number.

99649173 is a deficient number, since it is larger than the sum of its proper divisors (45785963).

99649173 is a wasteful number, since it uses less digits than its factorization.

99649173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41964.

The product of its digits is 367416, while the sum is 48.

The square root of 99649173 is about 9982.4432380054. The cubic root of 99649173 is about 463.6154491317.

The spelling of 99649173 in words is "ninety-nine million, six hundred forty-nine thousand, one hundred seventy-three".