16985287 has 8 divisors (see below), whose sum is σ = 18703872. Its totient is φ = 15295800.

The previous prime is 16985263. The next prime is 16985317. The reversal of 16985287 is 78258961.

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 16985287 - 2¹⁹ = 16460999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16985587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6039 + ... + 8392.

It is an arithmetic number, because the mean of its divisors is an integer number (2337984).

Almost surely, 2^16985287 is an apocalyptic number.

16985287 is a deficient number, since it is larger than the sum of its proper divisors (1718585).

16985287 is a wasteful number, since it uses less digits than its factorization.

16985287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14549.

The product of its digits is 241920, while the sum is 46.

The square root of 16985287 is about 4121.3210260789. The cubic root of 16985287 is about 257.0539587026.

The spelling of 16985287 in words is "sixteen million, nine hundred eighty-five thousand, two hundred eighty-seven".