812158871 has 2 divisors, whose sum is σ = 812158872. Its totient is φ = 812158870.

The previous prime is 812158859. The next prime is 812158883. The reversal of 812158871 is 178851218.

812158871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (812158859) and next prime (812158883).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812158871 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812158771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406079435 + 406079436.

It is an arithmetic number, because the mean of its divisors is an integer number (406079436).

Almost surely, 2^812158871 is an apocalyptic number.

812158871 is a deficient number, since it is larger than the sum of its proper divisors (1).

812158871 is an equidigital number, since it uses as much as digits as its factorization.

812158871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 41.

The square root of 812158871 is about 28498.4012007691. The cubic root of 812158871 is about 932.9971793546.

The spelling of 812158871 in words is "eight hundred twelve million, one hundred fifty-eight thousand, eight hundred seventy-one".