16138361 has 2 divisors, whose sum is σ = 16138362. Its totient is φ = 16138360.

The previous prime is 16138351. The next prime is 16138363. The reversal of 16138361 is 16383161.

16138361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15405625 + 732736 = 3925^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 16138361 - 2¹⁰ = 16137337 is a prime.

It is a Sophie Germain prime.

Together with 16138363, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16138363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8069180 + 8069181.

It is an arithmetic number, because the mean of its divisors is an integer number (8069181).

Almost surely, 2^16138361 is an apocalyptic number.

It is an amenable number.

16138361 is a deficient number, since it is larger than the sum of its proper divisors (1).

16138361 is an equidigital number, since it uses as much as digits as its factorization.

16138361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 16138361 is about 4017.2578956298. The cubic root of 16138361 is about 252.7084759967.

The spelling of 16138361 in words is "sixteen million, one hundred thirty-eight thousand, three hundred sixty-one".