7998686573 has 2 divisors, whose sum is σ = 7998686574. Its totient is φ = 7998686572.

The previous prime is 7998686569. The next prime is 7998686599. The reversal of 7998686573 is 3756868997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5725494889 + 2273191684 = 75667^2 + 47678^2 .

It is a cyclic number.

It is not a de Polignac number, because 7998686573 - 2² = 7998686569 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7998686503) 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, 3999343286 + 3999343287.

It is an arithmetic number, because the mean of its divisors is an integer number (3999343287).

Almost surely, 2^7998686573 is an apocalyptic number.

It is an amenable number.

7998686573 is a deficient number, since it is larger than the sum of its proper divisors (1).

7998686573 is an equidigital number, since it uses as much as digits as its factorization.

7998686573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137168640, while the sum is 68.

The square root of 7998686573 is about 89435.3765184672. The cubic root of 7998686573 is about 1999.8905417596.

The spelling of 7998686573 in words is "seven billion, nine hundred ninety-eight million, six hundred eighty-six thousand, five hundred seventy-three".