16648973 has 4 divisors (see below), whose sum is σ = 18162528. Its totient is φ = 15135420.

The previous prime is 16648949. The next prime is 16648981. The reversal of 16648973 is 37984661.

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 not a de Polignac number, because 16648973 - 2⁶ = 16648909 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 (16648673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 756761 + ... + 756782.

It is an arithmetic number, because the mean of its divisors is an integer number (4540632).

Almost surely, 2^16648973 is an apocalyptic number.

It is an amenable number.

16648973 is a deficient number, since it is larger than the sum of its proper divisors (1513555).

16648973 is a wasteful number, since it uses less digits than its factorization.

16648973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513554.

The product of its digits is 217728, while the sum is 44.

The square root of 16648973 is about 4080.3153064439. The cubic root of 16648973 is about 255.3460533005.

The spelling of 16648973 in words is "sixteen million, six hundred forty-eight thousand, nine hundred seventy-three".