16985291 has 4 divisors (see below), whose sum is σ = 17024952. Its totient is φ = 16945632.

The previous prime is 16985263. The next prime is 16985317. The reversal of 16985291 is 19258961.

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 16985291 - 2¹⁰ = 16984267 is a prime.

It is a super-2 number, since 2×16985291² = 577000220709362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16985251) 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, 19181 + ... + 20046.

It is an arithmetic number, because the mean of its divisors is an integer number (4256238).

Almost surely, 2^16985291 is an apocalyptic number.

16985291 is a deficient number, since it is larger than the sum of its proper divisors (39661).

16985291 is an equidigital number, since it uses as much as digits as its factorization.

16985291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39660.

The product of its digits is 38880, while the sum is 41.

The square root of 16985291 is about 4121.3215113602. The cubic root of 16985291 is about 257.0539788812.

The spelling of 16985291 in words is "sixteen million, nine hundred eighty-five thousand, two hundred ninety-one".