16389613 has 2 divisors, whose sum is σ = 16389614. Its totient is φ = 16389612.

The previous prime is 16389599. The next prime is 16389641. The reversal of 16389613 is 31698361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13557124 + 2832489 = 3682^2 + 1683^2 .

It is an emirp because it is prime and its reverse (31698361) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16389613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16389643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8194806 + 8194807.

It is an arithmetic number, because the mean of its divisors is an integer number (8194807).

Almost surely, 2^16389613 is an apocalyptic number.

It is an amenable number.

16389613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16389613 is an equidigital number, since it uses as much as digits as its factorization.

16389613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 16389613 is about 4048.4086997239. The cubic root of 16389613 is about 254.0131691769.

The spelling of 16389613 in words is "sixteen million, three hundred eighty-nine thousand, six hundred thirteen".