9989823 has 8 divisors (see below), whose sum is σ = 13347328. Its totient is φ = 6646104.

The previous prime is 9989813. The next prime is 9989827. The reversal of 9989823 is 3289899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9989823 - 2⁴ = 9989807 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 (9989827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1615 + ... + 4752.

It is an arithmetic number, because the mean of its divisors is an integer number (1668416).

Almost surely, 2^9989823 is an apocalyptic number.

9989823 is a deficient number, since it is larger than the sum of its proper divisors (3357505).

9989823 is a wasteful number, since it uses less digits than its factorization.

9989823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6893.

The product of its digits is 279936, while the sum is 48.

The square root of 9989823 is about 3160.6681255709. The cubic root of 9989823 is about 215.3703585900.

The spelling of 9989823 in words is "nine million, nine hundred eighty-nine thousand, eight hundred twenty-three".