812520847 has 2 divisors, whose sum is σ = 812520848. Its totient is φ = 812520846.

The previous prime is 812520829. The next prime is 812520941. The reversal of 812520847 is 748025218.

812520847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 812520847 - 2¹¹ = 812518799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812520827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406260423 + 406260424.

It is an arithmetic number, because the mean of its divisors is an integer number (406260424).

Almost surely, 2^812520847 is an apocalyptic number.

812520847 is a deficient number, since it is larger than the sum of its proper divisors (1).

812520847 is an equidigital number, since it uses as much as digits as its factorization.

812520847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 812520847 is about 28504.7513057034. The cubic root of 812520847 is about 933.1357698191.

The spelling of 812520847 in words is "eight hundred twelve million, five hundred twenty thousand, eight hundred forty-seven".