16238657 has 2 divisors, whose sum is σ = 16238658. Its totient is φ = 16238656.

The previous prime is 16238639. The next prime is 16238659. The reversal of 16238657 is 75683261.

16238657 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., 11895601 + 4343056 = 3449^2 + 2084^2 .

It is a cyclic number.

It is not a de Polignac number, because 16238657 - 2⁸ = 16238401 is a prime.

Together with 16238659, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16238657.

It is not a weakly prime, because it can be changed into another prime (16238659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8119328 + 8119329.

It is an arithmetic number, because the mean of its divisors is an integer number (8119329).

Almost surely, 2^16238657 is an apocalyptic number.

It is an amenable number.

16238657 is a deficient number, since it is larger than the sum of its proper divisors (1).

16238657 is an equidigital number, since it uses as much as digits as its factorization.

16238657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 16238657 is about 4029.7217025497. The cubic root of 16238657 is about 253.2309025338.

The spelling of 16238657 in words is "sixteen million, two hundred thirty-eight thousand, six hundred fifty-seven".