7987310669 has 4 divisors (see below), whose sum is σ = 8601719196. Its totient is φ = 7372902144.

The previous prime is 7987310629. The next prime is 7987310741. The reversal of 7987310669 is 9660137897.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1970205769 + 6017104900 = 44387^2 + 77570^2 .

It is a cyclic number.

It is not a de Polignac number, because 7987310669 - 2²⁰ = 7986262093 is a prime.

It is a super-2 number, since 2×7987310669² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7987310609) 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, 307204244 + ... + 307204269.

It is an arithmetic number, because the mean of its divisors is an integer number (2150429799).

Almost surely, 2^7987310669 is an apocalyptic number.

It is an amenable number.

7987310669 is a deficient number, since it is larger than the sum of its proper divisors (614408527).

7987310669 is a wasteful number, since it uses less digits than its factorization.

7987310669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614408526.

The product of its (nonzero) digits is 3429216, while the sum is 56.

The square root of 7987310669 is about 89371.7554320155. The cubic root of 7987310669 is about 1998.9419961626.

The spelling of 7987310669 in words is "seven billion, nine hundred eighty-seven million, three hundred ten thousand, six hundred sixty-nine".