998623326899 has 4 divisors (see below), whose sum is σ = 1089407265720. Its totient is φ = 907839388080.

The previous prime is 998623326853. The next prime is 998623326913.

998623326899 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998623326899 is a prime.

It is a super-4 number, since 4×998623326899⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (998623326499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45391969394 + ... + 45391969415.

It is an arithmetic number, because the mean of its divisors is an integer number (272351816430).

Almost surely, 2^998623326899 is an apocalyptic number.

998623326899 is a deficient number, since it is larger than the sum of its proper divisors (90783938821).

998623326899 is a wasteful number, since it uses less digits than its factorization.

998623326899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90783938820.

The product of its digits is 544195584, while the sum is 74.

The spelling of 998623326899 in words is "nine hundred ninety-eight billion, six hundred twenty-three million, three hundred twenty-six thousand, eight hundred ninety-nine".