16985585 has 4 divisors (see below), whose sum is σ = 20382708. Its totient is φ = 13588464.

The previous prime is 16985539. The next prime is 16985587. The reversal of 16985585 is 58558961.

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 4986289 + 11999296 = 2233^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 16985585 - 2¹⁴ = 16969201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16985587) 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, 1698554 + ... + 1698563.

It is an arithmetic number, because the mean of its divisors is an integer number (5095677).

Almost surely, 2^16985585 is an apocalyptic number.

It is an amenable number.

16985585 is a deficient number, since it is larger than the sum of its proper divisors (3397123).

16985585 is an equidigital number, since it uses as much as digits as its factorization.

16985585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3397122.

The product of its digits is 432000, while the sum is 47.

The square root of 16985585 is about 4121.3571793767. The cubic root of 16985585 is about 257.0554619964.

The spelling of 16985585 in words is "sixteen million, nine hundred eighty-five thousand, five hundred eighty-five".