812798143 has 4 divisors (see below), whose sum is σ = 812999968. Its totient is φ = 812596320.

The previous prime is 812798141. The next prime is 812798171. The reversal of 812798143 is 341897218.

812798143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 812798143 - 2¹ = 812798141 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 812798143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812798141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94746 + ... + 102967.

It is an arithmetic number, because the mean of its divisors is an integer number (203249992).

Almost surely, 2^812798143 is an apocalyptic number.

812798143 is a deficient number, since it is larger than the sum of its proper divisors (201825).

812798143 is a wasteful number, since it uses less digits than its factorization.

812798143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201824.

The product of its digits is 96768, while the sum is 43.

The square root of 812798143 is about 28509.6149219873. The cubic root of 812798143 is about 933.2419108440.

The spelling of 812798143 in words is "eight hundred twelve million, seven hundred ninety-eight thousand, one hundred forty-three".