7979687671 has 4 divisors (see below), whose sum is σ = 7982539344. Its totient is φ = 7976836000.

The previous prime is 7979687663. The next prime is 7979687731. The reversal of 7979687671 is 1767869797.

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 7979687671 - 2³ = 7979687663 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7979687597 and 7979687606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7979687071) 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, 1421635 + ... + 1427236.

It is an arithmetic number, because the mean of its divisors is an integer number (1995634836).

Almost surely, 2^7979687671 is an apocalyptic number.

7979687671 is a deficient number, since it is larger than the sum of its proper divisors (2851673).

7979687671 is a wasteful number, since it uses less digits than its factorization.

7979687671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2851672.

The product of its digits is 56010528, while the sum is 67.

The square root of 7979687671 is about 89329.0975606493. The cubic root of 7979687671 is about 1998.3058712858.

The spelling of 7979687671 in words is "seven billion, nine hundred seventy-nine million, six hundred eighty-seven thousand, six hundred seventy-one".