812855673 has 24 divisors (see below), whose sum is σ = 1400201088. Its totient is φ = 444292992.

The previous prime is 812855671. The next prime is 812855677. The reversal of 812855673 is 376558218.

812855673 is a `hidden beast` number, since 8 + 1 + 2 + 85 + 567 + 3 = 666.

812855673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 812855673 - 2¹ = 812855671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812855671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 279040 + ... + 281937.

It is an arithmetic number, because the mean of its divisors is an integer number (58341712).

Almost surely, 2^812855673 is an apocalyptic number.

It is an amenable number.

812855673 is a deficient number, since it is larger than the sum of its proper divisors (587345415).

812855673 is a wasteful number, since it uses less digits than its factorization.

812855673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561013 (or 561010 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 812855673 is about 28510.6238619922. The cubic root of 812855673 is about 933.2639286684.

The spelling of 812855673 in words is "eight hundred twelve million, eight hundred fifty-five thousand, six hundred seventy-three".