998830609 has 4 divisors (see below), whose sum is σ = 1141520704. Its totient is φ = 856140516.

The previous prime is 998830559. The next prime is 998830619. The reversal of 998830609 is 906038899.

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, and also an emirpimes, since its reverse is a distinct semiprime: 906038899 = 709 ⋅1277911.

It is not a de Polignac number, because 998830609 - 2⁹ = 998830097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998830619) 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, 71345037 + ... + 71345050.

It is an arithmetic number, because the mean of its divisors is an integer number (285380176).

Almost surely, 2^998830609 is an apocalyptic number.

It is an amenable number.

998830609 is a deficient number, since it is larger than the sum of its proper divisors (142690095).

998830609 is a wasteful number, since it uses less digits than its factorization.

998830609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142690094.

The product of its (nonzero) digits is 839808, while the sum is 52.

The square root of 998830609 is about 31604.2814979237. The cubic root of 998830609 is about 999.6100509595.

The spelling of 998830609 in words is "nine hundred ninety-eight million, eight hundred thirty thousand, six hundred nine".