16238399 has 2 divisors, whose sum is σ = 16238400. Its totient is φ = 16238398.

The previous prime is 16238381. The next prime is 16238401. The reversal of 16238399 is 99383261.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16238399 - 2⁸ = 16238143 is a prime.

It is a Sophie Germain prime.

Together with 16238401, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16238329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8119199 + 8119200.

It is an arithmetic number, because the mean of its divisors is an integer number (8119200).

Almost surely, 2^16238399 is an apocalyptic number.

16238399 is a deficient number, since it is larger than the sum of its proper divisors (1).

16238399 is an equidigital number, since it uses as much as digits as its factorization.

16238399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 16238399 is about 4029.6896902863. The cubic root of 16238399 is about 253.2295614147.

The spelling of 16238399 in words is "sixteen million, two hundred thirty-eight thousand, three hundred ninety-nine".