16389589 has 2 divisors, whose sum is σ = 16389590. Its totient is φ = 16389588.

The previous prime is 16389563. The next prime is 16389599. The reversal of 16389589 is 98598361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14002564 + 2387025 = 3742^2 + 1545^2 .

It is an emirp because it is prime and its reverse (98598361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16389589 - 2¹³ = 16381397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16389539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8194794 + 8194795.

It is an arithmetic number, because the mean of its divisors is an integer number (8194795).

Almost surely, 2^16389589 is an apocalyptic number.

It is an amenable number.

16389589 is a deficient number, since it is larger than the sum of its proper divisors (1).

16389589 is an equidigital number, since it uses as much as digits as its factorization.

16389589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The square root of 16389589 is about 4048.4057355952. The cubic root of 16389589 is about 254.0130451894.

The spelling of 16389589 in words is "sixteen million, three hundred eighty-nine thousand, five hundred eighty-nine".