8120829999 has 8 divisors (see below), whose sum is σ = 11058151680. Its totient is φ = 5298697496.

The previous prime is 8120829979. The next prime is 8120830001. The reversal of 8120829999 is 9999280218.

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 8120829999 - 2¹¹ = 8120827951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8120829929) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 28797129 + ... + 28797410.

It is an arithmetic number, because the mean of its divisors is an integer number (1382268960).

Almost surely, 2^8120829999 is an apocalyptic number.

8120829999 is a deficient number, since it is larger than the sum of its proper divisors (2937321681).

8120829999 is a wasteful number, since it uses less digits than its factorization.

8120829999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57594589.

The product of its (nonzero) digits is 1679616, while the sum is 57.

The square root of 8120829999 is about 90115.6479142219. The cubic root of 8120829999 is about 2010.0188936617.

The spelling of 8120829999 in words is "eight billion, one hundred twenty million, eight hundred twenty-nine thousand, nine hundred ninety-nine".