9979567679 has 2 divisors, whose sum is σ = 9979567680. Its totient is φ = 9979567678.

The previous prime is 9979567651. The next prime is 9979567687. The reversal of 9979567679 is 9767659799.

It is a strong prime.

It is an emirp because it is prime and its reverse (9767659799) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9979567679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9979561679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989783839 + 4989783840.

It is an arithmetic number, because the mean of its divisors is an integer number (4989783840).

Almost surely, 2^9979567679 is an apocalyptic number.

9979567679 is a deficient number, since it is larger than the sum of its proper divisors (1).

9979567679 is an equidigital number, since it uses as much as digits as its factorization.

9979567679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405076140, while the sum is 74.

The square root of 9979567679 is about 99897.7861566511. The cubic root of 9979567679 is about 2152.9663528208.

The spelling of 9979567679 in words is "nine billion, nine hundred seventy-nine million, five hundred sixty-seven thousand, six hundred seventy-nine".