16238813 has 2 divisors, whose sum is σ = 16238814. Its totient is φ = 16238812.

The previous prime is 16238809. The next prime is 16238861. The reversal of 16238813 is 31883261.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15665764 + 573049 = 3958^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 16238813 - 2² = 16238809 is a prime.

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 16238813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16238113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8119406 + 8119407.

It is an arithmetic number, because the mean of its divisors is an integer number (8119407).

Almost surely, 2^16238813 is an apocalyptic number.

It is an amenable number.

16238813 is a deficient number, since it is larger than the sum of its proper divisors (1).

16238813 is an equidigital number, since it uses as much as digits as its factorization.

16238813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 32.

The square root of 16238813 is about 4029.7410586786. The cubic root of 16238813 is about 253.2317134361.

The spelling of 16238813 in words is "sixteen million, two hundred thirty-eight thousand, eight hundred thirteen".