16989589 has 4 divisors (see below), whose sum is σ = 17029440. Its totient is φ = 16949740.

The previous prime is 16989569. The next prime is 16989593. The reversal of 16989589 is 98598961.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16989589 - 2⁷ = 16989461 is a prime.

It is a super-2 number, since 2×16989589² = 577292268777842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16989529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19279 + ... + 20140.

It is an arithmetic number, because the mean of its divisors is an integer number (4257360).

Almost surely, 2^16989589 is an apocalyptic number.

It is an amenable number.

16989589 is a deficient number, since it is larger than the sum of its proper divisors (39851).

16989589 is an equidigital number, since it uses as much as digits as its factorization.

16989589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39850.

The product of its digits is 1399680, while the sum is 55.

The square root of 16989589 is about 4121.8429130669. The cubic root of 16989589 is about 257.0756589106.

It can be divided in two parts, 16989 and 589, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 16989589 in words is "sixteen million, nine hundred eighty-nine thousand, five hundred eighty-nine".