998173684 has 12 divisors (see below), whose sum is σ = 1747646208. Its totient is φ = 498846200.

The previous prime is 998173651. The next prime is 998173699. The reversal of 998173684 is 486371899.

998173684 is nontrivially palindromic in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50662 + ... + 67549.

It is an arithmetic number, because the mean of its divisors is an integer number (145637184).

Almost surely, 2^998173684 is an apocalyptic number.

998173684 is the 16888-th nonagonal number.

It is an amenable number.

998173684 is a deficient number, since it is larger than the sum of its proper divisors (749472524).

998173684 is a wasteful number, since it uses less digits than its factorization.

998173684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120326 (or 120324 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 998173684 is about 31593.8868137493. The cubic root of 998173684 is about 999.3908570202.

The spelling of 998173684 in words is "nine hundred ninety-eight million, one hundred seventy-three thousand, six hundred eighty-four".