16382809 has 4 divisors (see below), whose sum is σ = 16533220. Its totient is φ = 16232400.

The previous prime is 16382801. The next prime is 16382813. The reversal of 16382809 is 90828361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6110784 + 10272025 = 2472^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 16382809 - 2³ = 16382801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16382801) 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, 75042 + ... + 75259.

It is an arithmetic number, because the mean of its divisors is an integer number (4133305).

Almost surely, 2^16382809 is an apocalyptic number.

It is an amenable number.

16382809 is a deficient number, since it is larger than the sum of its proper divisors (150411).

16382809 is a wasteful number, since it uses less digits than its factorization.

16382809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150410.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 16382809 is about 4047.5682823147. The cubic root of 16382809 is about 253.9780138863.

The spelling of 16382809 in words is "sixteen million, three hundred eighty-two thousand, eight hundred nine".