812305205 has 8 divisors (see below), whose sum is σ = 975640992. Its totient is φ = 649261008.

The previous prime is 812305181. The next prime is 812305213. The reversal of 812305205 is 502503218.

812305205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 812305205 - 2¹² = 812301109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66719 + ... + 77948.

It is an arithmetic number, because the mean of its divisors is an integer number (121955124).

Almost surely, 2^812305205 is an apocalyptic number.

It is an amenable number.

812305205 is a deficient number, since it is larger than the sum of its proper divisors (163335787).

812305205 is a wasteful number, since it uses less digits than its factorization.

812305205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145795.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 812305205 is about 28500.9684923162. The cubic root of 812305205 is about 933.0532114994.

The spelling of 812305205 in words is "eight hundred twelve million, three hundred five thousand, two hundred five".