681848329 has 2 divisors, whose sum is σ = 681848330. Its totient is φ = 681848328.

The previous prime is 681848311. The next prime is 681848333. The reversal of 681848329 is 923848186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364046400 + 317801929 = 19080^2 + 17827^2 .

It is a cyclic number.

It is not a de Polignac number, because 681848329 - 2¹¹ = 681846281 is a prime.

It is not a weakly prime, because it can be changed into another prime (681848369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340924164 + 340924165.

It is an arithmetic number, because the mean of its divisors is an integer number (340924165).

Almost surely, 2^681848329 is an apocalyptic number.

It is an amenable number.

681848329 is a deficient number, since it is larger than the sum of its proper divisors (1).

681848329 is an equidigital number, since it uses as much as digits as its factorization.

681848329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 49.

The square root of 681848329 is about 26112.2256615555. The cubic root of 681848329 is about 880.1619575361.

The spelling of 681848329 in words is "six hundred eighty-one million, eight hundred forty-eight thousand, three hundred twenty-nine".