16985243 has 4 divisors (see below), whose sum is σ = 18529368. Its totient is φ = 15441120.

The previous prime is 16985233. The next prime is 16985249. The reversal of 16985243 is 34258961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16985243 - 2⁸ = 16984987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16985197 and 16985206.

It is not an unprimeable number, because it can be changed into a prime (16985249) 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 3 ways as a sum of consecutive naturals, for example, 772046 + ... + 772067.

It is an arithmetic number, because the mean of its divisors is an integer number (4632342).

Almost surely, 2^16985243 is an apocalyptic number.

16985243 is a deficient number, since it is larger than the sum of its proper divisors (1544125).

16985243 is a wasteful number, since it uses less digits than its factorization.

16985243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544124.

The product of its digits is 51840, while the sum is 38.

The square root of 16985243 is about 4121.3156879812. The cubic root of 16985243 is about 257.0537367383.

The spelling of 16985243 in words is "sixteen million, nine hundred eighty-five thousand, two hundred forty-three".