16823109 has 4 divisors (see below), whose sum is σ = 22430816. Its totient is φ = 11215404.

The previous prime is 16823087. The next prime is 16823117. The reversal of 16823109 is 90132861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16823109 - 2⁵ = 16823077 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 (16823119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2803849 + ... + 2803854.

It is an arithmetic number, because the mean of its divisors is an integer number (5607704).

Almost surely, 2^16823109 is an apocalyptic number.

It is an amenable number.

16823109 is a deficient number, since it is larger than the sum of its proper divisors (5607707).

16823109 is an equidigital number, since it uses as much as digits as its factorization.

16823109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5607706.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 16823109 is about 4101.5983469862. The cubic root of 16823109 is about 256.2332113530.

The spelling of 16823109 in words is "sixteen million, eight hundred twenty-three thousand, one hundred nine".