16864823 has 4 divisors (see below), whose sum is σ = 16873080. Its totient is φ = 16856568.

The previous prime is 16864811. The next prime is 16864831. The reversal of 16864823 is 32846861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16864823 - 2¹⁰ = 16863799 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 (16864873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1436 + ... + 5982.

It is an arithmetic number, because the mean of its divisors is an integer number (4218270).

Almost surely, 2^16864823 is an apocalyptic number.

16864823 is a deficient number, since it is larger than the sum of its proper divisors (8257).

16864823 is an equidigital number, since it uses as much as digits as its factorization.

16864823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8256.

The product of its digits is 55296, while the sum is 38.

The square root of 16864823 is about 4106.6802894796. The cubic root of 16864823 is about 256.4448188912. Note that the first 3 decimals are identical.

The spelling of 16864823 in words is "sixteen million, eight hundred sixty-four thousand, eight hundred twenty-three".