812305667 has 2 divisors, whose sum is σ = 812305668. Its totient is φ = 812305666.

The previous prime is 812305657. The next prime is 812305673. The reversal of 812305667 is 766503218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 812305667 - 2⁶ = 812305603 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812305667.

It is not a weakly prime, because it can be changed into another prime (812305657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406152833 + 406152834.

It is an arithmetic number, because the mean of its divisors is an integer number (406152834).

Almost surely, 2^812305667 is an apocalyptic number.

812305667 is a deficient number, since it is larger than the sum of its proper divisors (1).

812305667 is an equidigital number, since it uses as much as digits as its factorization.

812305667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 812305667 is about 28500.9765973028. The cubic root of 812305667 is about 933.0533883912.

The spelling of 812305667 in words is "eight hundred twelve million, three hundred five thousand, six hundred sixty-seven".