812851197 has 8 divisors (see below), whose sum is σ = 1084272000. Its totient is φ = 541665600.

The previous prime is 812851157. The next prime is 812851219. The reversal of 812851197 is 791158218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 812851197 - 2⁷ = 812851069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812851157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50572 + ... + 64677.

It is an arithmetic number, because the mean of its divisors is an integer number (135534000).

Almost surely, 2^812851197 is an apocalyptic number.

It is an amenable number.

812851197 is a deficient number, since it is larger than the sum of its proper divisors (271420803).

812851197 is a wasteful number, since it uses less digits than its factorization.

812851197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117603.

The product of its digits is 40320, while the sum is 42.

The square root of 812851197 is about 28510.5453648295. The cubic root of 812851197 is about 933.2622156554.

The spelling of 812851197 in words is "eight hundred twelve million, eight hundred fifty-one thousand, one hundred ninety-seven".