16105009 has 4 divisors (see below), whose sum is σ = 16228080. Its totient is φ = 15981940.

The previous prime is 16105003. The next prime is 16105031. The reversal of 16105009 is 90050161.

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.

It is a cyclic number.

It is not a de Polignac number, because 16105009 - 2⁹ = 16104497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16105003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61339 + ... + 61600.

It is an arithmetic number, because the mean of its divisors is an integer number (4057020).

Almost surely, 2^16105009 is an apocalyptic number.

It is an amenable number.

16105009 is a deficient number, since it is larger than the sum of its proper divisors (123071).

16105009 is a wasteful number, since it uses less digits than its factorization.

16105009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123070.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 16105009 is about 4013.1046584907. The cubic root of 16105009 is about 252.5342710729.

The spelling of 16105009 in words is "sixteen million, one hundred five thousand, nine".