812208317 has 2 divisors, whose sum is σ = 812208318. Its totient is φ = 812208316.

The previous prime is 812208289. The next prime is 812208323. The reversal of 812208317 is 713802218.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549152356 + 263055961 = 23434^2 + 16219^2 .

It is a cyclic number.

It is not a de Polignac number, because 812208317 - 2¹⁰ = 812207293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812201317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406104158 + 406104159.

It is an arithmetic number, because the mean of its divisors is an integer number (406104159).

Almost surely, 2^812208317 is an apocalyptic number.

It is an amenable number.

812208317 is a deficient number, since it is larger than the sum of its proper divisors (1).

812208317 is an equidigital number, since it uses as much as digits as its factorization.

812208317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 812208317 is about 28499.2687099160. The cubic root of 812208317 is about 933.0161132702.

The spelling of 812208317 in words is "eight hundred twelve million, two hundred eight thousand, three hundred seventeen".