838194493 has 2 divisors, whose sum is σ = 838194494. Its totient is φ = 838194492.

The previous prime is 838194491. The next prime is 838194499. The reversal of 838194493 is 394491838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 800776804 + 37417689 = 28298^2 + 6117^2 .

It is a cyclic number.

It is not a de Polignac number, because 838194493 - 2¹ = 838194491 is a prime.

Together with 838194491, 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 (838194491) 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, 419097246 + 419097247.

It is an arithmetic number, because the mean of its divisors is an integer number (419097247).

Almost surely, 2^838194493 is an apocalyptic number.

It is an amenable number.

838194493 is a deficient number, since it is larger than the sum of its proper divisors (1).

838194493 is an equidigital number, since it uses as much as digits as its factorization.

838194493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 49.

The square root of 838194493 is about 28951.5887819650. The cubic root of 838194493 is about 942.8622929219.

The spelling of 838194493 in words is "eight hundred thirty-eight million, one hundred ninety-four thousand, four hundred ninety-three".