812678071 has 2 divisors, whose sum is σ = 812678072. Its totient is φ = 812678070.

The previous prime is 812678063. The next prime is 812678077. The reversal of 812678071 is 170876218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812678071 - 2³ = 812678063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812678077) 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 as a sum of consecutive naturals, namely, 406339035 + 406339036.

It is an arithmetic number, because the mean of its divisors is an integer number (406339036).

Almost surely, 2^812678071 is an apocalyptic number.

812678071 is a deficient number, since it is larger than the sum of its proper divisors (1).

812678071 is an equidigital number, since it uses as much as digits as its factorization.

812678071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 812678071 is about 28507.5090283244. The cubic root of 812678071 is about 933.1959536601.

The spelling of 812678071 in words is "eight hundred twelve million, six hundred seventy-eight thousand, seventy-one".