16386289 has 2 divisors, whose sum is σ = 16386290. Its totient is φ = 16386288.

The previous prime is 16386287. The next prime is 16386299. The reversal of 16386289 is 98268361.

16386289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 250000 = 4017^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 16386289 - 2¹ = 16386287 is a prime.

Together with 16386287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16386287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8193144 + 8193145.

It is an arithmetic number, because the mean of its divisors is an integer number (8193145).

Almost surely, 2^16386289 is an apocalyptic number.

It is an amenable number.

16386289 is a deficient number, since it is larger than the sum of its proper divisors (1).

16386289 is an equidigital number, since it uses as much as digits as its factorization.

16386289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 43.

The square root of 16386289 is about 4047.9981472328. The cubic root of 16386289 is about 253.9959957622.

The spelling of 16386289 in words is "sixteen million, three hundred eighty-six thousand, two hundred eighty-nine".