79698289729 has 2 divisors, whose sum is σ = 79698289730. Its totient is φ = 79698289728.

The previous prime is 79698289691. The next prime is 79698289777. The reversal of 79698289729 is 92798289697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76866453504 + 2831836225 = 277248^2 + 53215^2 .

It is an emirp because it is prime and its reverse (92798289697) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79698289729 - 2³³ = 71108355137 is a prime.

It is not a weakly prime, because it can be changed into another prime (79698289129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39849144864 + 39849144865.

It is an arithmetic number, because the mean of its divisors is an integer number (39849144865).

Almost surely, 2^79698289729 is an apocalyptic number.

It is an amenable number.

79698289729 is a deficient number, since it is larger than the sum of its proper divisors (1).

79698289729 is an equidigital number, since it uses as much as digits as its factorization.

79698289729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493807104, while the sum is 76.

The spelling of 79698289729 in words is "seventy-nine billion, six hundred ninety-eight million, two hundred eighty-nine thousand, seven hundred twenty-nine".