16748689 has 16 divisors (see below), whose sum is σ = 18720720. Its totient is φ = 14909440.

The previous prime is 16748681. The next prime is 16748701. The reversal of 16748689 is 98684761.

It can be written as a sum of positive squares in 8 ways, for example, as 3968064 + 12780625 = 1992^2 + 3575^2 .

It is a cyclic number.

It is not a de Polignac number, because 16748689 - 2³ = 16748681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16748681) 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 15 ways as a sum of consecutive naturals, for example, 25809 + ... + 26449.

It is an arithmetic number, because the mean of its divisors is an integer number (1170045).

Almost surely, 2^16748689 is an apocalyptic number.

It is an amenable number.

16748689 is a deficient number, since it is larger than the sum of its proper divisors (1972031).

16748689 is a wasteful number, since it uses less digits than its factorization.

16748689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740.

The product of its digits is 580608, while the sum is 49.

The square root of 16748689 is about 4092.5162186606. The cubic root of 16748689 is about 255.8548218595.

The spelling of 16748689 in words is "sixteen million, seven hundred forty-eight thousand, six hundred eighty-nine".