99999405173 has 8 divisors (see below), whose sum is σ = 100245454848. Its totient is φ = 99753617344.

The previous prime is 99999405139. The next prime is 99999405227. The reversal of 99999405173 is 37150499999.

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 99999405173 - 2⁸ = 99999404917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999405673) 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, 710540 + ... + 839562.

It is an arithmetic number, because the mean of its divisors is an integer number (12530681856).

Almost surely, 2^99999405173 is an apocalyptic number.

It is an amenable number.

99999405173 is a deficient number, since it is larger than the sum of its proper divisors (246049675).

99999405173 is a wasteful number, since it uses less digits than its factorization.

99999405173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130923.

The product of its (nonzero) digits is 24800580, while the sum is 65.

The spelling of 99999405173 in words is "ninety-nine billion, nine hundred ninety-nine million, four hundred five thousand, one hundred seventy-three".