818732947 has 2 divisors, whose sum is σ = 818732948. Its totient is φ = 818732946.

The previous prime is 818732917. The next prime is 818732951. The reversal of 818732947 is 749237818.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 818732947 - 2²⁷ = 684515219 is a prime.

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 818732947.

It is not a weakly prime, because it can be changed into another prime (818732917) 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, 409366473 + 409366474.

It is an arithmetic number, because the mean of its divisors is an integer number (409366474).

Almost surely, 2^818732947 is an apocalyptic number.

818732947 is a deficient number, since it is larger than the sum of its proper divisors (1).

818732947 is an equidigital number, since it uses as much as digits as its factorization.

818732947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 818732947 is about 28613.5098685918. The cubic root of 818732947 is about 935.5078206452.

The spelling of 818732947 in words is "eight hundred eighteen million, seven hundred thirty-two thousand, nine hundred forty-seven".