9819923 has 4 divisors (see below), whose sum is σ = 9837240. Its totient is φ = 9802608.

The previous prime is 9819913. The next prime is 9819947. The reversal of 9819923 is 3299189.

9819923 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3299189 = 23 ⋅143443.

It is a cyclic number.

It is not a de Polignac number, because 9819923 - 2⁴ = 9819907 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (9819913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7778 + ... + 8951.

It is an arithmetic number, because the mean of its divisors is an integer number (2459310).

Almost surely, 2^9819923 is an apocalyptic number.

9819923 is a deficient number, since it is larger than the sum of its proper divisors (17317).

9819923 is a wasteful number, since it uses less digits than its factorization.

9819923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17316.

The product of its digits is 34992, while the sum is 41.

The square root of 9819923 is about 3133.6756373307. The cubic root of 9819923 is about 214.1424140116.

The spelling of 9819923 in words is "nine million, eight hundred nineteen thousand, nine hundred twenty-three".