998498389 has 4 divisors (see below), whose sum is σ = 1141141024. Its totient is φ = 855855756.

The previous prime is 998498351. The next prime is 998498419. The reversal of 998498389 is 983894899.

998498389 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 998498389 - 2⁷ = 998498261 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 (998498339) 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, 71321307 + ... + 71321320.

It is an arithmetic number, because the mean of its divisors is an integer number (285285256).

Almost surely, 2^998498389 is an apocalyptic number.

It is an amenable number.

998498389 is a deficient number, since it is larger than the sum of its proper divisors (142642635).

998498389 is a wasteful number, since it uses less digits than its factorization.

998498389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142642634.

The product of its digits is 40310784, while the sum is 67.

The square root of 998498389 is about 31599.0251273675. The cubic root of 998498389 is about 999.4992122535.

The spelling of 998498389 in words is "nine hundred ninety-eight million, four hundred ninety-eight thousand, three hundred eighty-nine".