9640009979 has 2 divisors, whose sum is σ = 9640009980. Its totient is φ = 9640009978.

The previous prime is 9640009931. The next prime is 9640010041. The reversal of 9640009979 is 9799000469.

It is a weak prime.

It is an emirp because it is prime and its reverse (9799000469) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9640009979 - 2⁸ = 9640009723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9640009979.

It is not a weakly prime, because it can be changed into another prime (9640009079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4820004989 + 4820004990.

It is an arithmetic number, because the mean of its divisors is an integer number (4820004990).

Almost surely, 2^9640009979 is an apocalyptic number.

9640009979 is a deficient number, since it is larger than the sum of its proper divisors (1).

9640009979 is an equidigital number, since it uses as much as digits as its factorization.

9640009979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1102248, while the sum is 53.

The square root of 9640009979 is about 98183.5524871656. The cubic root of 9640009979 is about 2128.2656117939.

The spelling of 9640009979 in words is "nine billion, six hundred forty million, nine thousand, nine hundred seventy-nine".