998508671 has 4 divisors (see below), whose sum is σ = 1006371072. Its totient is φ = 990646272.

The previous prime is 998508659. The next prime is 998508703. The reversal of 998508671 is 176805899.

998508671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 998508671 - 2⁶ = 998508607 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 (998508601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3931010 + ... + 3931263.

It is an arithmetic number, because the mean of its divisors is an integer number (251592768).

Almost surely, 2^998508671 is an apocalyptic number.

998508671 is a deficient number, since it is larger than the sum of its proper divisors (7862401).

998508671 is a wasteful number, since it uses less digits than its factorization.

998508671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7862400.

The product of its (nonzero) digits is 1088640, while the sum is 53.

The square root of 998508671 is about 31599.1878218412. The cubic root of 998508671 is about 999.5026430104.

The spelling of 998508671 in words is "nine hundred ninety-eight million, five hundred eight thousand, six hundred seventy-one".