812309636 has 6 divisors (see below), whose sum is σ = 1421541870. Its totient is φ = 406154816.

The previous prime is 812309609. The next prime is 812309677. The reversal of 812309636 is 636903218.

It can be written as a sum of positive squares in only one way, i.e., 528724036 + 283585600 = 22994^2 + 16840^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 812309636.

It is an unprimeable number.

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, 101538701 + ... + 101538708.

It is an arithmetic number, because the mean of its divisors is an integer number (236923645).

Almost surely, 2^812309636 is an apocalyptic number.

It is an amenable number.

812309636 is a deficient number, since it is larger than the sum of its proper divisors (609232234).

812309636 is a wasteful number, since it uses less digits than its factorization.

812309636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203077413 (or 203077411 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 812309636 is about 28501.0462264107. The cubic root of 812309636 is about 933.0549080502.

The spelling of 812309636 in words is "eight hundred twelve million, three hundred nine thousand, six hundred thirty-six".