683206681 has 2 divisors, whose sum is σ = 683206682. Its totient is φ = 683206680.

The previous prime is 683206627. The next prime is 683206687. The reversal of 683206681 is 186602386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403648281 + 279558400 = 20091^2 + 16720^2 .

It is a cyclic number.

It is not a de Polignac number, because 683206681 - 2¹¹ = 683204633 is a prime.

It is a super-2 number, since 2×683206681² = 933542737926071522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (683206687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341603340 + 341603341.

It is an arithmetic number, because the mean of its divisors is an integer number (341603341).

Almost surely, 2^683206681 is an apocalyptic number.

It is an amenable number.

683206681 is a deficient number, since it is larger than the sum of its proper divisors (1).

683206681 is an equidigital number, since it uses as much as digits as its factorization.

683206681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 683206681 is about 26138.2226059845. Note that the first 3 decimals coincide. The cubic root of 683206681 is about 880.7460447685.

The spelling of 683206681 in words is "six hundred eighty-three million, two hundred six thousand, six hundred eighty-one".