16889691 has 24 divisors (see below), whose sum is σ = 27874560. Its totient is φ = 8906976.

The previous prime is 16889671. The next prime is 16889701. The reversal of 16889691 is 19698861.

It is not a de Polignac number, because 16889691 - 2⁹ = 16889179 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16889691.

It is not an unprimeable number, because it can be changed into a prime (16889641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1170 + ... + 5928.

It is an arithmetic number, because the mean of its divisors is an integer number (1161440).

Almost surely, 2^16889691 is an apocalyptic number.

16889691 is a deficient number, since it is larger than the sum of its proper divisors (10984869).

16889691 is a wasteful number, since it uses less digits than its factorization.

16889691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4795 (or 4782 counting only the distinct ones).

The product of its digits is 186624, while the sum is 48.

The square root of 16889691 is about 4109.7069238572. The cubic root of 16889691 is about 256.5708037649.

The spelling of 16889691 in words is "sixteen million, eight hundred eighty-nine thousand, six hundred ninety-one".