9979567651 has 2 divisors, whose sum is σ = 9979567652. Its totient is φ = 9979567650.

The previous prime is 9979567621. The next prime is 9979567679. The reversal of 9979567651 is 1567659799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9979567651 - 2⁹ = 9979567139 is a prime.

It is not a weakly prime, because it can be changed into another prime (9979567621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989783825 + 4989783826.

It is an arithmetic number, because the mean of its divisors is an integer number (4989783826).

Almost surely, 2^9979567651 is an apocalyptic number.

9979567651 is a deficient number, since it is larger than the sum of its proper divisors (1).

9979567651 is an equidigital number, since it uses as much as digits as its factorization.

9979567651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32148900, while the sum is 64.

The square root of 9979567651 is about 99897.7860165079. The cubic root of 9979567651 is about 2152.9663508072.

The spelling of 9979567651 in words is "nine billion, nine hundred seventy-nine million, five hundred sixty-seven thousand, six hundred fifty-one".