682123729561 has 2 divisors, whose sum is σ = 682123729562. Its totient is φ = 682123729560.

The previous prime is 682123729549. The next prime is 682123729571. The reversal of 682123729561 is 165927321286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 349096632336 + 333027097225 = 590844^2 + 577085^2 .

It is a cyclic number.

It is not a de Polignac number, because 682123729561 - 2³¹ = 679976245913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 682123729499 and 682123729508.

It is not a weakly prime, because it can be changed into another prime (682123729571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 341061864780 + 341061864781.

It is an arithmetic number, because the mean of its divisors is an integer number (341061864781).

Almost surely, 2^682123729561 is an apocalyptic number.

It is an amenable number.

682123729561 is a deficient number, since it is larger than the sum of its proper divisors (1).

682123729561 is an equidigital number, since it uses as much as digits as its factorization.

682123729561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 52.

The spelling of 682123729561 in words is "six hundred eighty-two billion, one hundred twenty-three million, seven hundred twenty-nine thousand, five hundred sixty-one".