79841279993 has 2 divisors, whose sum is σ = 79841279994. Its totient is φ = 79841279992.

The previous prime is 79841279981. The next prime is 79841280007. The reversal of 79841279993 is 39997214897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44541258304 + 35300021689 = 211048^2 + 187883^2 .

It is a cyclic number.

It is not a de Polignac number, because 79841279993 - 2¹⁰ = 79841278969 is a prime.

It is not a weakly prime, because it can be changed into another prime (79841279923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39920639996 + 39920639997.

It is an arithmetic number, because the mean of its divisors is an integer number (39920639997).

Almost surely, 2^79841279993 is an apocalyptic number.

It is an amenable number.

79841279993 is a deficient number, since it is larger than the sum of its proper divisors (1).

79841279993 is an equidigital number, since it uses as much as digits as its factorization.

79841279993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61725888, while the sum is 68.

The spelling of 79841279993 in words is "seventy-nine billion, eight hundred forty-one million, two hundred seventy-nine thousand, nine hundred ninety-three".