818188243 has 2 divisors, whose sum is σ = 818188244. Its totient is φ = 818188242.

The previous prime is 818188213. The next prime is 818188253. The reversal of 818188243 is 342881818.

818188243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 818188243 - 2⁵ = 818188211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 818188243.

It is not a weakly prime, because it can be changed into another prime (818188213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409094121 + 409094122.

It is an arithmetic number, because the mean of its divisors is an integer number (409094122).

Almost surely, 2^818188243 is an apocalyptic number.

818188243 is a deficient number, since it is larger than the sum of its proper divisors (1).

818188243 is an equidigital number, since it uses as much as digits as its factorization.

818188243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98304, while the sum is 43.

The square root of 818188243 is about 28603.9899839166. The cubic root of 818188243 is about 935.3003097987.

The spelling of 818188243 in words is "eight hundred eighteen million, one hundred eighty-eight thousand, two hundred forty-three".