9138384439 has 2 divisors, whose sum is σ = 9138384440. Its totient is φ = 9138384438.

The previous prime is 9138384427. The next prime is 9138384443. The reversal of 9138384439 is 9344838319.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9138384439 - 2¹⁵ = 9138351671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9138384139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569192219 + 4569192220.

It is an arithmetic number, because the mean of its divisors is an integer number (4569192220).

Almost surely, 2^9138384439 is an apocalyptic number.

9138384439 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138384439 is an equidigital number, since it uses as much as digits as its factorization.

9138384439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 52.

The square root of 9138384439 is about 95594.8975573487. The cubic root of 9138384439 is about 2090.6907997070.

The spelling of 9138384439 in words is "nine billion, one hundred thirty-eight million, three hundred eighty-four thousand, four hundred thirty-nine".