812866197 has 16 divisors (see below), whose sum is σ = 1273301568. Its totient is φ = 454750080.

The previous prime is 812866183. The next prime is 812866199. The reversal of 812866197 is 791668218.

812866197 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 812866197 - 2⁴ = 812866181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812866199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946968 + ... + 947825.

It is an arithmetic number, because the mean of its divisors is an integer number (79581348).

Almost surely, 2^812866197 is an apocalyptic number.

It is an amenable number.

812866197 is a deficient number, since it is larger than the sum of its proper divisors (460435371).

812866197 is a wasteful number, since it uses less digits than its factorization.

812866197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1894820.

The product of its digits is 290304, while the sum is 48.

The square root of 812866197 is about 28510.8084241749. The cubic root of 812866197 is about 933.2679562908.

The spelling of 812866197 in words is "eight hundred twelve million, eight hundred sixty-six thousand, one hundred ninety-seven".