998026823 has 4 divisors (see below), whose sum is σ = 998144928. Its totient is φ = 997908720.

The previous prime is 998026819. The next prime is 998026849. The reversal of 998026823 is 328620899.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328620899 = 491 ⋅669289.

It is a cyclic number.

It is not a de Polignac number, because 998026823 - 2² = 998026819 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 (998026723) 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, 45311 + ... + 63632.

It is an arithmetic number, because the mean of its divisors is an integer number (249536232).

Almost surely, 2^998026823 is an apocalyptic number.

998026823 is a deficient number, since it is larger than the sum of its proper divisors (118105).

998026823 is a wasteful number, since it uses less digits than its factorization.

998026823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118104.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 998026823 is about 31591.5625286246. The cubic root of 998026823 is about 999.3418412554.

The spelling of 998026823 in words is "nine hundred ninety-eight million, twenty-six thousand, eight hundred twenty-three".