998508673 has 4 divisors (see below), whose sum is σ = 1012186948. Its totient is φ = 984830400.

The previous prime is 998508659. The next prime is 998508703. The reversal of 998508673 is 376805899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 376805899 = 31 ⋅12155029.

It can be written as a sum of positive squares in 2 ways, for example, as 287913024 + 710595649 = 16968^2 + 26657^2 .

It is a cyclic number.

It is not a de Polignac number, because 998508673 - 2²⁵ = 964954241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998508613) 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, 6839028 + ... + 6839173.

It is an arithmetic number, because the mean of its divisors is an integer number (253046737).

Almost surely, 2^998508673 is an apocalyptic number.

It is an amenable number.

998508673 is a deficient number, since it is larger than the sum of its proper divisors (13678275).

998508673 is a wasteful number, since it uses less digits than its factorization.

998508673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13678274.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 998508673 is about 31599.1878534876. The cubic root of 998508673 is about 999.5026436777.

The spelling of 998508673 in words is "nine hundred ninety-eight million, five hundred eight thousand, six hundred seventy-three".