8120970899 has 4 divisors (see below), whose sum is σ = 8548390440. Its totient is φ = 7693551360.

The previous prime is 8120970883. The next prime is 8120970911. The reversal of 8120970899 is 9980790218.

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

It is a cyclic number.

It is not a de Polignac number, because 8120970899 - 2⁴ = 8120970883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8120970899.

It is not an unprimeable number, because it can be changed into a prime (8120970859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213709742 + ... + 213709779.

It is an arithmetic number, because the mean of its divisors is an integer number (2137097610).

Almost surely, 2^8120970899 is an apocalyptic number.

8120970899 is a deficient number, since it is larger than the sum of its proper divisors (427419541).

8120970899 is a wasteful number, since it uses less digits than its factorization.

8120970899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427419540.

The product of its (nonzero) digits is 653184, while the sum is 53.

The square root of 8120970899 is about 90116.4296840482. The cubic root of 8120970899 is about 2010.0305185007.

The spelling of 8120970899 in words is "eight billion, one hundred twenty million, nine hundred seventy thousand, eight hundred ninety-nine".