16209085 has 4 divisors (see below), whose sum is σ = 19450908. Its totient is φ = 12967264.

The previous prime is 16209077. The next prime is 16209097. The reversal of 16209085 is 58090261.

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 7851204 + 8357881 = 2802^2 + 2891^2 .

It is a cyclic number.

It is not a de Polignac number, because 16209085 - 2³ = 16209077 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620904 + ... + 1620913.

It is an arithmetic number, because the mean of its divisors is an integer number (4862727).

Almost surely, 2^16209085 is an apocalyptic number.

It is an amenable number.

16209085 is a deficient number, since it is larger than the sum of its proper divisors (3241823).

16209085 is an equidigital number, since it uses as much as digits as its factorization.

16209085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3241822.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 16209085 is about 4026.0507945132. The cubic root of 16209085 is about 253.0770906634.

The spelling of 16209085 in words is "sixteen million, two hundred nine thousand, eighty-five".