16648189 has 4 divisors (see below), whose sum is σ = 16676224. Its totient is φ = 16620156.

The previous prime is 16648183. The next prime is 16648211. The reversal of 16648189 is 98184661.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98184661 = 97 ⋅1012213.

It is a cyclic number.

It is not a de Polignac number, because 16648189 - 2⁷ = 16648061 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 (16648183) 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, 13107 + ... + 14320.

It is an arithmetic number, because the mean of its divisors is an integer number (4169056).

Almost surely, 2^16648189 is an apocalyptic number.

It is an amenable number.

16648189 is a deficient number, since it is larger than the sum of its proper divisors (28035).

16648189 is an equidigital number, since it uses as much as digits as its factorization.

16648189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28034.

The product of its digits is 82944, while the sum is 43.

The square root of 16648189 is about 4080.2192343059. The cubic root of 16648189 is about 255.3420451564.

The spelling of 16648189 in words is "sixteen million, six hundred forty-eight thousand, one hundred eighty-nine".