16623349 has 4 divisors (see below), whose sum is σ = 16667136. Its totient is φ = 16579564.

The previous prime is 16623337. The next prime is 16623353. The reversal of 16623349 is 94332661.

It is a happy number.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16623349 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 (16623359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21319 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (4166784).

Almost surely, 2^16623349 is an apocalyptic number.

It is an amenable number.

16623349 is a deficient number, since it is larger than the sum of its proper divisors (43787).

16623349 is an equidigital number, since it uses as much as digits as its factorization.

16623349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43786.

The product of its digits is 23328, while the sum is 34.

The square root of 16623349 is about 4077.1741439384. The cubic root of 16623349 is about 255.2149872210.

The spelling of 16623349 in words is "sixteen million, six hundred twenty-three thousand, three hundred forty-nine".