8212197729 has 8 divisors (see below), whose sum is σ = 11023084800. Its totient is φ = 5438054576.

The previous prime is 8212197661. The next prime is 8212197733. The reversal of 8212197729 is 9277912128.

It is a happy number.

8212197729 is digitally balanced in base 3, 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 8212197729 - 2⁸ = 8212197473 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8212197739) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9185457 + ... + 9186350.

It is an arithmetic number, because the mean of its divisors is an integer number (1377885600).

Almost surely, 2^8212197729 is an apocalyptic number.

It is an amenable number.

8212197729 is a deficient number, since it is larger than the sum of its proper divisors (2810887071).

8212197729 is a wasteful number, since it uses less digits than its factorization.

8212197729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18371959.

The product of its digits is 254016, while the sum is 48.

The square root of 8212197729 is about 90621.1770448828. The cubic root of 8212197729 is about 2017.5290612460.

The spelling of 8212197729 in words is "eight billion, two hundred twelve million, one hundred ninety-seven thousand, seven hundred twenty-nine".