812678429 has 2 divisors, whose sum is σ = 812678430. Its totient is φ = 812678428.

The previous prime is 812678407. The next prime is 812678441. The reversal of 812678429 is 924876218.

It is a happy number.

812678429 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., 488498404 + 324180025 = 22102^2 + 18005^2 .

It is a cyclic number.

It is not a de Polignac number, because 812678429 - 2¹² = 812674333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812678459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406339214 + 406339215.

It is an arithmetic number, because the mean of its divisors is an integer number (406339215).

Almost surely, 2^812678429 is an apocalyptic number.

It is an amenable number.

812678429 is a deficient number, since it is larger than the sum of its proper divisors (1).

812678429 is an equidigital number, since it uses as much as digits as its factorization.

812678429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 47.

The square root of 812678429 is about 28507.5153073711. The cubic root of 812678429 is about 933.1960906902.

The spelling of 812678429 in words is "eight hundred twelve million, six hundred seventy-eight thousand, four hundred twenty-nine".