16704865 has 4 divisors (see below), whose sum is σ = 20045844. Its totient is φ = 13363888.

The previous prime is 16704851. The next prime is 16704889. The reversal of 16704865 is 56840761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56840761 = 19 ⋅2991619.

It can be written as a sum of positive squares in 2 ways, for example, as 6155361 + 10549504 = 2481^2 + 3248^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16704865 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, 1670482 + ... + 1670491.

It is an arithmetic number, because the mean of its divisors is an integer number (5011461).

Almost surely, 2^16704865 is an apocalyptic number.

It is an amenable number.

16704865 is a deficient number, since it is larger than the sum of its proper divisors (3340979).

16704865 is an equidigital number, since it uses as much as digits as its factorization.

16704865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340978.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 16704865 is about 4087.1585484295. The cubic root of 16704865 is about 255.6314735240.

The spelling of 16704865 in words is "sixteen million, seven hundred four thousand, eight hundred sixty-five".