993838399 has 2 divisors, whose sum is σ = 993838400. Its totient is φ = 993838398.

The previous prime is 993838397. The next prime is 993838409.

993838399 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 993838399 - 2¹ = 993838397 is a prime.

Together with 993838397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (993838397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496919199 + 496919200.

It is an arithmetic number, because the mean of its divisors is an integer number (496919200).

Almost surely, 2^993838399 is an apocalyptic number.

993838399 is a deficient number, since it is larger than the sum of its proper divisors (1).

993838399 is an equidigital number, since it uses as much as digits as its factorization.

993838399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11337408, while the sum is 61.

The square root of 993838399 is about 31525.2026004592. The cubic root of 993838399 is about 997.9419001308.

The spelling of 993838399 in words is "nine hundred ninety-three million, eight hundred thirty-eight thousand, three hundred ninety-nine".