79194313889 has 2 divisors, whose sum is σ = 79194313890. Its totient is φ = 79194313888.

The previous prime is 79194313883. The next prime is 79194313909. The reversal of 79194313889 is 98831349197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77595673600 + 1598640289 = 278560^2 + 39983^2 .

It is a cyclic number.

It is not a de Polignac number, because 79194313889 - 2¹² = 79194309793 is a prime.

It is not a weakly prime, because it can be changed into another prime (79194313883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39597156944 + 39597156945.

It is an arithmetic number, because the mean of its divisors is an integer number (39597156945).

Almost surely, 2^79194313889 is an apocalyptic number.

It is an amenable number.

79194313889 is a deficient number, since it is larger than the sum of its proper divisors (1).

79194313889 is an equidigital number, since it uses as much as digits as its factorization.

79194313889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 62.

The spelling of 79194313889 in words is "seventy-nine billion, one hundred ninety-four million, three hundred thirteen thousand, eight hundred eighty-nine".