998173685 has 8 divisors (see below), whose sum is σ = 1199546016. Its totient is φ = 797380560.

The previous prime is 998173651. The next prime is 998173699. The reversal of 998173685 is 586371899.

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

It is not a de Polignac number, because 998173685 - 2¹⁴ = 998157301 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 998173685.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140999 + ... + 147908.

It is an arithmetic number, because the mean of its divisors is an integer number (149943252).

Almost surely, 2^998173685 is an apocalyptic number.

It is an amenable number.

998173685 is a deficient number, since it is larger than the sum of its proper divisors (201372331).

998173685 is a wasteful number, since it uses less digits than its factorization.

998173685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289603.

The product of its digits is 3265920, while the sum is 56.

The square root of 998173685 is about 31593.8868295751. The cubic root of 998173685 is about 999.3908573539.

The spelling of 998173685 in words is "nine hundred ninety-eight million, one hundred seventy-three thousand, six hundred eighty-five".