681727229 has 2 divisors, whose sum is σ = 681727230. Its totient is φ = 681727228.

The previous prime is 681727187. The next prime is 681727253. The reversal of 681727229 is 922727186.

681727229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502970329 + 178756900 = 22427^2 + 13370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-681727229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 681727229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681717229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340863614 + 340863615.

It is an arithmetic number, because the mean of its divisors is an integer number (340863615).

Almost surely, 2^681727229 is an apocalyptic number.

It is an amenable number.

681727229 is a deficient number, since it is larger than the sum of its proper divisors (1).

681727229 is an equidigital number, since it uses as much as digits as its factorization.

681727229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 681727229 is about 26109.9067213960. The cubic root of 681727229 is about 880.1098472552.

The spelling of 681727229 in words is "six hundred eighty-one million, seven hundred twenty-seven thousand, two hundred twenty-nine".