16949689 has 9 divisors (see below), whose sum is σ = 17818213. Its totient is φ = 16122172.

The previous prime is 16949633. The next prime is 16949707. The reversal of 16949689 is 98694961.

The square root of 16949689 is 4117.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 16949689 - 2¹¹ = 16947641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16949789) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 94602 + ... + 94780.

Almost surely, 2^16949689 is an apocalyptic number.

16949689 is the 4117-th square number.

16949689 is the 2059-th centered octagonal number.

It is an amenable number.

16949689 is a deficient number, since it is larger than the sum of its proper divisors (868524).

16949689 is an frugal number, since it uses more digits than its factorization.

16949689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 202 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The cubic root of 16949689 is about 256.8742540180.

The spelling of 16949689 in words is "sixteen million, nine hundred forty-nine thousand, six hundred eighty-nine".