16016389 has 2 divisors, whose sum is σ = 16016390. Its totient is φ = 16016388.

The previous prime is 16016387. The next prime is 16016401. The reversal of 16016389 is 98361061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15864289 + 152100 = 3983^2 + 390^2 .

It is an emirp because it is prime and its reverse (98361061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16016389 - 2¹ = 16016387 is a prime.

Together with 16016387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16016387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8008194 + 8008195.

It is an arithmetic number, because the mean of its divisors is an integer number (8008195).

Almost surely, 2^16016389 is an apocalyptic number.

It is an amenable number.

16016389 is a deficient number, since it is larger than the sum of its proper divisors (1).

16016389 is an equidigital number, since it uses as much as digits as its factorization.

16016389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 16016389 is about 4002.0481006605. The cubic root of 16016389 is about 252.0702174782.

The spelling of 16016389 in words is "sixteen million, sixteen thousand, three hundred eighty-nine".