938381399 has 2 divisors, whose sum is σ = 938381400. Its totient is φ = 938381398.

The previous prime is 938381341. The next prime is 938381401. The reversal of 938381399 is 993183839.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 938381399 - 2¹² = 938377303 is a prime.

It is a Sophie Germain prime.

Together with 938381401, 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 938381399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (938381599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 469190699 + 469190700.

It is an arithmetic number, because the mean of its divisors is an integer number (469190700).

Almost surely, 2^938381399 is an apocalyptic number.

938381399 is a deficient number, since it is larger than the sum of its proper divisors (1).

938381399 is an equidigital number, since it uses as much as digits as its factorization.

938381399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 53.

The square root of 938381399 is about 30633.0115888073. The cubic root of 938381399 is about 979.0235307038.

The spelling of 938381399 in words is "nine hundred thirty-eight million, three hundred eighty-one thousand, three hundred ninety-nine".