812305229 has 2 divisors, whose sum is σ = 812305230. Its totient is φ = 812305228.

The previous prime is 812305223. The next prime is 812305231. The reversal of 812305229 is 922503218.

It is a happy number.

812305229 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 can be written as a sum of positive squares in only one way, i.e., 800041225 + 12264004 = 28285^2 + 3502^2 .

It is a cyclic number.

It is not a de Polignac number, because 812305229 - 2⁴ = 812305213 is a prime.

Together with 812305231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 812305195 and 812305204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812305223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406152614 + 406152615.

It is an arithmetic number, because the mean of its divisors is an integer number (406152615).

Almost surely, 2^812305229 is an apocalyptic number.

It is an amenable number.

812305229 is a deficient number, since it is larger than the sum of its proper divisors (1).

812305229 is an equidigital number, since it uses as much as digits as its factorization.

812305229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 812305229 is about 28500.9689133545. The cubic root of 812305229 is about 933.0532206885.

The spelling of 812305229 in words is "eight hundred twelve million, three hundred five thousand, two hundred twenty-nine".