79936221793 has 2 divisors, whose sum is σ = 79936221794. Its totient is φ = 79936221792.

The previous prime is 79936221787. The next prime is 79936221863. The reversal of 79936221793 is 39712263997.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43633778769 + 36302443024 = 208887^2 + 190532^2 .

It is a cyclic number.

It is not a de Polignac number, because 79936221793 - 2¹³ = 79936213601 is a prime.

It is not a weakly prime, because it can be changed into another prime (79936221293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39968110896 + 39968110897.

It is an arithmetic number, because the mean of its divisors is an integer number (39968110897).

Almost surely, 2^79936221793 is an apocalyptic number.

It is an amenable number.

79936221793 is a deficient number, since it is larger than the sum of its proper divisors (1).

79936221793 is an equidigital number, since it uses as much as digits as its factorization.

79936221793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7715736, while the sum is 58.

The spelling of 79936221793 in words is "seventy-nine billion, nine hundred thirty-six million, two hundred twenty-one thousand, seven hundred ninety-three".