9791229979 has 2 divisors, whose sum is σ = 9791229980. Its totient is φ = 9791229978.

The previous prime is 9791229949. The next prime is 9791229983. The reversal of 9791229979 is 9799221979.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9791229979 - 2¹¹ = 9791227931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9791229979.

It is not a weakly prime, because it can be changed into another prime (9791229949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895614989 + 4895614990.

It is an arithmetic number, because the mean of its divisors is an integer number (4895614990).

Almost surely, 2^9791229979 is an apocalyptic number.

9791229979 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791229979 is an equidigital number, since it uses as much as digits as its factorization.

9791229979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11573604, while the sum is 64.

The square root of 9791229979 is about 98950.6441565693. The cubic root of 9791229979 is about 2139.3364160105.

The spelling of 9791229979 in words is "nine billion, seven hundred ninety-one million, two hundred twenty-nine thousand, nine hundred seventy-nine".