16604985 has 8 divisors (see below), whose sum is σ = 26568000. Its totient is φ = 8855984.

The previous prime is 16604947. The next prime is 16604989. The reversal of 16604985 is 58940661.

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 16604985 - 2⁶ = 16604921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16604989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553485 + ... + 553514.

It is an arithmetic number, because the mean of its divisors is an integer number (3321000).

Almost surely, 2^16604985 is an apocalyptic number.

16604985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16604985 is a deficient number, since it is larger than the sum of its proper divisors (9963015).

16604985 is a wasteful number, since it uses less digits than its factorization.

16604985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107007.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 16604985 is about 4074.9214716360. The cubic root of 16604985 is about 255.1209729738.

The spelling of 16604985 in words is "sixteen million, six hundred four thousand, nine hundred eighty-five".