818779873 has 2 divisors, whose sum is σ = 818779874. Its totient is φ = 818779872.

The previous prime is 818779723. The next prime is 818779877. The reversal of 818779873 is 378977818.

818779873 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 can be written as a sum of positive squares in only one way, i.e., 657819904 + 160959969 = 25648^2 + 12687^2 .

It is a cyclic number.

It is not a de Polignac number, because 818779873 - 2²¹ = 816682721 is a prime.

It is a super-2 number, since 2×818779873² = 1340800960859792258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (818779877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409389936 + 409389937.

It is an arithmetic number, because the mean of its divisors is an integer number (409389937).

Almost surely, 2^818779873 is an apocalyptic number.

It is an amenable number.

818779873 is a deficient number, since it is larger than the sum of its proper divisors (1).

818779873 is an equidigital number, since it uses as much as digits as its factorization.

818779873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4741632, while the sum is 58.

The square root of 818779873 is about 28614.3298541133. The cubic root of 818779873 is about 935.5256933029.

The spelling of 818779873 in words is "eight hundred eighteen million, seven hundred seventy-nine thousand, eight hundred seventy-three".