16000009 has 8 divisors (see below), whose sum is σ = 17093160. Its totient is φ = 14923776.

The previous prime is 15999989. The next prime is 16000057. The reversal of 16000009 is 90000061.

It can be written as a sum of positive squares in 4 ways, for example, as 9 + 16000000 = 3^2 + 4000^2 .

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 16000009 - 2¹³ = 15991817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15999956 and 16000001.

It is not an unprimeable number, because it can be changed into a prime (16000079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2244 + ... + 6085.

It is an arithmetic number, because the mean of its divisors is an integer number (2136645).

Almost surely, 2^16000009 is an apocalyptic number.

It is an amenable number.

16000009 is a deficient number, since it is larger than the sum of its proper divisors (1093151).

16000009 is a wasteful number, since it uses less digits than its factorization.

16000009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8459.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 16000009 is about 4000.0011249998. The cubic root of 16000009 is about 251.9842572260.

The spelling of 16000009 in words is "sixteen million, nine", and thus it is an aban number and an uban number.