7997011009 has 8 divisors (see below), whose sum is σ = 8822219112. Its totient is φ = 7201810560.

The previous prime is 7997011003. The next prime is 7997011039. The reversal of 7997011009 is 9001107997.

It can be written as a sum of positive squares in 4 ways, for example, as 235929600 + 7761081409 = 15360^2 + 88097^2 .

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 7997011009 - 2⁷ = 7997010881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7997011003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7501354 + ... + 7502419.

It is an arithmetic number, because the mean of its divisors is an integer number (1102777389).

Almost surely, 2^7997011009 is an apocalyptic number.

It is an amenable number.

7997011009 is a deficient number, since it is larger than the sum of its proper divisors (825208103).

7997011009 is a wasteful number, since it uses less digits than its factorization.

7997011009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15003827.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 7997011009 is about 89426.0085713323. The cubic root of 7997011009 is about 1999.7508863892.

The spelling of 7997011009 in words is "seven billion, nine hundred ninety-seven million, eleven thousand, nine".