998433605 has 16 divisors (see below), whose sum is σ = 1334778480. Its totient is φ = 711879168.

The previous prime is 998433589. The next prime is 998433617. The reversal of 998433605 is 506334899.

998433605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 31598²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 128006596 + 870427009 = 11314^2 + 29503^2 .

It is not a de Polignac number, because 998433605 - 2⁴ = 998433589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998433605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 262952 + ... + 266721.

It is an arithmetic number, because the mean of its divisors is an integer number (83423655).

Almost surely, 2^998433605 is an apocalyptic number.

It is an amenable number.

998433605 is a deficient number, since it is larger than the sum of its proper divisors (336344875).

998433605 is a wasteful number, since it uses less digits than its factorization.

998433605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529720.

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 998433605 is about 31598.0000158238. Note that the first 4 decimals coincide. The cubic root of 998433605 is about 999.4775954744.

The spelling of 998433605 in words is "nine hundred ninety-eight million, four hundred thirty-three thousand, six hundred five".