16889643 has 6 divisors (see below), whose sum is σ = 24396164. Its totient is φ = 11259756.

The previous prime is 16889641. The next prime is 16889671. The reversal of 16889643 is 34698861.

It is not a de Polignac number, because 16889643 - 2¹ = 16889641 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 938305 + ... + 938322.

Almost surely, 2^16889643 is an apocalyptic number.

16889643 is a deficient number, since it is larger than the sum of its proper divisors (7506521).

16889643 is a wasteful number, since it uses less digits than its factorization.

16889643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876633 (or 1876630 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 16889643 is about 4109.7010840206. The cubic root of 16889643 is about 256.5705607092.

The spelling of 16889643 in words is "sixteen million, eight hundred eighty-nine thousand, six hundred forty-three".