818344399 has 2 divisors, whose sum is σ = 818344400. Its totient is φ = 818344398.

The previous prime is 818344361. The next prime is 818344403. The reversal of 818344399 is 993443818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 818344399 - 2²³ = 809955791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (818344339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409172199 + 409172200.

It is an arithmetic number, because the mean of its divisors is an integer number (409172200).

Almost surely, 2^818344399 is an apocalyptic number.

818344399 is a deficient number, since it is larger than the sum of its proper divisors (1).

818344399 is an equidigital number, since it uses as much as digits as its factorization.

818344399 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 818344399 is about 28606.7194728791. The cubic root of 818344399 is about 935.3598085207.

The spelling of 818344399 in words is "eight hundred eighteen million, three hundred forty-four thousand, three hundred ninety-nine".