16489709 has 8 divisors (see below), whose sum is σ = 16793280. Its totient is φ = 16189056.

The previous prime is 16489691. The next prime is 16489723. The reversal of 16489709 is 90798461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16489709 - 2⁸ = 16489453 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16489709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16489729) 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 7 ways as a sum of consecutive naturals, for example, 12872 + ... + 14094.

It is an arithmetic number, because the mean of its divisors is an integer number (2099160).

Almost surely, 2^16489709 is an apocalyptic number.

It is an amenable number.

16489709 is a deficient number, since it is larger than the sum of its proper divisors (303571).

16489709 is a wasteful number, since it uses less digits than its factorization.

16489709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 16489709 is about 4060.7522702081. The cubic root of 16489709 is about 254.5292300999.

The spelling of 16489709 in words is "sixteen million, four hundred eighty-nine thousand, seven hundred nine".