16611323 has 4 divisors (see below), whose sum is σ = 16710960. Its totient is φ = 16511688.

The previous prime is 16611311. The next prime is 16611341. The reversal of 16611323 is 32311661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16611323 - 2⁴ = 16611307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16611523) 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, 49568 + ... + 49901.

It is an arithmetic number, because the mean of its divisors is an integer number (4177740).

Almost surely, 2^16611323 is an apocalyptic number.

16611323 is a deficient number, since it is larger than the sum of its proper divisors (99637).

16611323 is an equidigital number, since it uses as much as digits as its factorization.

16611323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99636.

The product of its digits is 648, while the sum is 23.

The square root of 16611323 is about 4075.6990811393. The cubic root of 16611323 is about 255.1534281079.

Adding to 16611323 its reverse (32311661), we get a palindrome (48922984).

The spelling of 16611323 in words is "sixteen million, six hundred eleven thousand, three hundred twenty-three".