812106671 has 4 divisors (see below), whose sum is σ = 812194752. Its totient is φ = 812018592.

The previous prime is 812106667. The next prime is 812106731. The reversal of 812106671 is 176601218.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 176601218 = 2 ⋅88300609.

It is a cyclic number.

It is not a de Polignac number, because 812106671 - 2² = 812106667 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812106641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28346 + ... + 49271.

It is an arithmetic number, because the mean of its divisors is an integer number (203048688).

Almost surely, 2^812106671 is an apocalyptic number.

812106671 is a deficient number, since it is larger than the sum of its proper divisors (88081).

812106671 is a wasteful number, since it uses less digits than its factorization.

812106671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88080.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 812106671 is about 28497.4853452020. The cubic root of 812106671 is about 932.9771900406.

Adding to 812106671 its reverse (176601218), we get a palindrome (988707889).

The spelling of 812106671 in words is "eight hundred twelve million, one hundred six thousand, six hundred seventy-one".