812678395 has 4 divisors (see below), whose sum is σ = 975214080. Its totient is φ = 650142712.

The previous prime is 812678381. The next prime is 812678401. The reversal of 812678395 is 593876218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812678395 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 81267835 + ... + 81267844.

It is an arithmetic number, because the mean of its divisors is an integer number (243803520).

Almost surely, 2^812678395 is an apocalyptic number.

812678395 is a deficient number, since it is larger than the sum of its proper divisors (162535685).

812678395 is a wasteful number, since it uses less digits than its factorization.

812678395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162535684.

The product of its digits is 725760, while the sum is 49.

The square root of 812678395 is about 28507.5147110372. The cubic root of 812678395 is about 933.1960776762.

The spelling of 812678395 in words is "eight hundred twelve million, six hundred seventy-eight thousand, three hundred ninety-five".