16860985 has 4 divisors (see below), whose sum is σ = 20233188. Its totient is φ = 13488784.

The previous prime is 16860973. The next prime is 16861003. The reversal of 16860985 is 58906861.

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 4414201 + 12446784 = 2101^2 + 3528^2 .

It is a cyclic number.

It is not a de Polignac number, because 16860985 - 2¹⁷ = 16729913 is a prime.

It is a Duffinian 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, 1686094 + ... + 1686103.

It is an arithmetic number, because the mean of its divisors is an integer number (5058297).

Almost surely, 2^16860985 is an apocalyptic number.

It is an amenable number.

16860985 is a deficient number, since it is larger than the sum of its proper divisors (3372203).

16860985 is an equidigital number, since it uses as much as digits as its factorization.

16860985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372202.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 16860985 is about 4106.2129754800. The cubic root of 16860985 is about 256.4253640000.

The spelling of 16860985 in words is "sixteen million, eight hundred sixty thousand, nine hundred eighty-five".