16389897893 has 2 divisors, whose sum is σ = 16389897894. Its totient is φ = 16389897892.

The previous prime is 16389897871. The next prime is 16389897899. The reversal of 16389897893 is 39879898361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14892053089 + 1497844804 = 122033^2 + 38702^2 .

It is a cyclic number.

It is not a de Polignac number, because 16389897893 - 2¹² = 16389893797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16389897899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8194948946 + 8194948947.

It is an arithmetic number, because the mean of its divisors is an integer number (8194948947).

Almost surely, 2^16389897893 is an apocalyptic number.

It is an amenable number.

16389897893 is a deficient number, since it is larger than the sum of its proper divisors (1).

16389897893 is an equidigital number, since it uses as much as digits as its factorization.

16389897893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141087744, while the sum is 71.

The spelling of 16389897893 in words is "sixteen billion, three hundred eighty-nine million, eight hundred ninety-seven thousand, eight hundred ninety-three".