16085409 has 4 divisors (see below), whose sum is σ = 21447216. Its totient is φ = 10723604.

The previous prime is 16085389. The next prime is 16085411. The reversal of 16085409 is 90458061.

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 a de Polignac number, because none of the positive numbers 2^k-16085409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16085409.

It is not an unprimeable number, because it can be changed into a prime (16085429) 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 3 ways as a sum of consecutive naturals, for example, 2680899 + ... + 2680904.

It is an arithmetic number, because the mean of its divisors is an integer number (5361804).

Almost surely, 2^16085409 is an apocalyptic number.

It is an amenable number.

16085409 is a deficient number, since it is larger than the sum of its proper divisors (5361807).

16085409 is an equidigital number, since it uses as much as digits as its factorization.

16085409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361806.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 16085409 is about 4010.6619154449. The cubic root of 16085409 is about 252.4317836830.

The spelling of 16085409 in words is "sixteen million, eighty-five thousand, four hundred nine".