676981972369 has 2 divisors, whose sum is σ = 676981972370. Its totient is φ = 676981972368.

The previous prime is 676981972363. The next prime is 676981972393. The reversal of 676981972369 is 963279189676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476155201600 + 200826770769 = 690040^2 + 448137^2 .

It is a cyclic number.

It is not a de Polignac number, because 676981972369 - 2¹⁷ = 676981841297 is a prime.

It is a super-2 number, since 2×676981972369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (676981972363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338490986184 + 338490986185.

It is an arithmetic number, because the mean of its divisors is an integer number (338490986185).

Almost surely, 2^676981972369 is an apocalyptic number.

It is an amenable number.

676981972369 is a deficient number, since it is larger than the sum of its proper divisors (1).

676981972369 is an equidigital number, since it uses as much as digits as its factorization.

676981972369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 370355328, while the sum is 73.

The spelling of 676981972369 in words is "six hundred seventy-six billion, nine hundred eighty-one million, nine hundred seventy-two thousand, three hundred sixty-nine".