812523871 has 2 divisors, whose sum is σ = 812523872. Its totient is φ = 812523870.

The previous prime is 812523851. The next prime is 812523889. The reversal of 812523871 is 178325218.

812523871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812523871 - 2⁵ = 812523839 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812523871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812523821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406261935 + 406261936.

It is an arithmetic number, because the mean of its divisors is an integer number (406261936).

Almost surely, 2^812523871 is an apocalyptic number.

812523871 is a deficient number, since it is larger than the sum of its proper divisors (1).

812523871 is an equidigital number, since it uses as much as digits as its factorization.

812523871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 812523871 is about 28504.8043494426. The cubic root of 812523871 is about 933.1369274506.

The spelling of 812523871 in words is "eight hundred twelve million, five hundred twenty-three thousand, eight hundred seventy-one".