812089163 has 4 divisors (see below), whose sum is σ = 812833248. Its totient is φ = 811345080.

The previous prime is 812089153. The next prime is 812089177. The reversal of 812089163 is 361980218.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812089163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (812089153) 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, 370403 + ... + 372588.

It is an arithmetic number, because the mean of its divisors is an integer number (203208312).

Almost surely, 2^812089163 is an apocalyptic number.

812089163 is a deficient number, since it is larger than the sum of its proper divisors (744085).

812089163 is a wasteful number, since it uses less digits than its factorization.

812089163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744084.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 812089163 is about 28497.1781585476. The cubic root of 812089163 is about 932.9704853869.

The spelling of 812089163 in words is "eight hundred twelve million, eighty-nine thousand, one hundred sixty-three".