16928789 has 4 divisors (see below), whose sum is σ = 17289024. Its totient is φ = 16568556.

The previous prime is 16928767. The next prime is 16928797. The reversal of 16928789 is 98782961.

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: 98782961 = 29 ⋅3406309.

It is a cyclic number.

It is not a de Polignac number, because 16928789 - 2²⁴ = 151573 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 (16928729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180047 + ... + 180140.

It is an arithmetic number, because the mean of its divisors is an integer number (4322256).

Almost surely, 2^16928789 is an apocalyptic number.

It is an amenable number.

16928789 is a deficient number, since it is larger than the sum of its proper divisors (360235).

16928789 is an equidigital number, since it uses as much as digits as its factorization.

16928789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360234.

The product of its digits is 435456, while the sum is 50.

The square root of 16928789 is about 4114.4609610495. The cubic root of 16928789 is about 256.7686300533.

The spelling of 16928789 in words is "sixteen million, nine hundred twenty-eight thousand, seven hundred eighty-nine".