979598625930781 has 2 divisors, whose sum is σ = 979598625930782. Its totient is φ = 979598625930780.

The previous prime is 979598625930779. The next prime is 979598625930811. The reversal of 979598625930781 is 187039526895979.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 748806775263556 + 230791850667225 = 27364334^2 + 15191835^2 .

It is an emirp because it is prime and its reverse (187039526895979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 979598625930781 - 2¹ = 979598625930779 is a prime.

It is a super-2 number, since 2×979598625930781² (a number of 31 digits) contains 22 as substring.

Together with 979598625930779, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 979598625930692 and 979598625930701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (979598625930181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489799312965390 + 489799312965391.

It is an arithmetic number, because the mean of its divisors is an integer number (489799312965391).

Almost surely, 2^{979598625930781} is an apocalyptic number.

It is an amenable number.

979598625930781 is a deficient number, since it is larger than the sum of its proper divisors (1).

979598625930781 is an equidigital number, since it uses as much as digits as its factorization.

979598625930781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18517766400, while the sum is 88.

The spelling of 979598625930781 in words is "nine hundred seventy-nine trillion, five hundred ninety-eight billion, six hundred twenty-five million, nine hundred thirty thousand, seven hundred eighty-one".