7984679687 has 2 divisors, whose sum is σ = 7984679688. Its totient is φ = 7984679686.

The previous prime is 7984679657. The next prime is 7984679749. The reversal of 7984679687 is 7869764897.

It is a weak prime.

It is an emirp because it is prime and its reverse (7869764897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7984679687 - 2²⁰ = 7983631111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7984679687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7984679657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3992339843 + 3992339844.

It is an arithmetic number, because the mean of its divisors is an integer number (3992339844).

Almost surely, 2^7984679687 is an apocalyptic number.

7984679687 is a deficient number, since it is larger than the sum of its proper divisors (1).

7984679687 is an equidigital number, since it uses as much as digits as its factorization.

7984679687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256048128, while the sum is 71.

The square root of 7984679687 is about 89357.0349049251. The cubic root of 7984679687 is about 1998.7224914096.

The spelling of 7984679687 in words is "seven billion, nine hundred eighty-four million, six hundred seventy-nine thousand, six hundred eighty-seven".