9979579811 has 2 divisors, whose sum is σ = 9979579812. Its totient is φ = 9979579810.

The previous prime is 9979579781. The next prime is 9979579823. The reversal of 9979579811 is 1189759799.

9979579811 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9979579811 - 2⁶ = 9979579747 is a prime.

It is not a weakly prime, because it can be changed into another prime (9979579891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4989789905 + 4989789906.

It is an arithmetic number, because the mean of its divisors is an integer number (4989789906).

Almost surely, 2^9979579811 is an apocalyptic number.

9979579811 is a deficient number, since it is larger than the sum of its proper divisors (1).

9979579811 is an equidigital number, since it uses as much as digits as its factorization.

9979579811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12859560, while the sum is 65.

The square root of 9979579811 is about 99897.8468786990. The cubic root of 9979579811 is about 2152.9672252626.

The spelling of 9979579811 in words is "nine billion, nine hundred seventy-nine million, five hundred seventy-nine thousand, eight hundred eleven".