681339229 has 2 divisors, whose sum is σ = 681339230. Its totient is φ = 681339228.

The previous prime is 681339227. The next prime is 681339247. The reversal of 681339229 is 922933186.

681339229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490844025 + 190495204 = 22155^2 + 13802^2 .

It is a cyclic number.

It is not a de Polignac number, because 681339229 - 2¹ = 681339227 is a prime.

Together with 681339227, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681339227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340669614 + 340669615.

It is an arithmetic number, because the mean of its divisors is an integer number (340669615).

Almost surely, 2^681339229 is an apocalyptic number.

It is an amenable number.

681339229 is a deficient number, since it is larger than the sum of its proper divisors (1).

681339229 is an equidigital number, since it uses as much as digits as its factorization.

681339229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 43.

The square root of 681339229 is about 26102.4755339412. The cubic root of 681339229 is about 879.9428462364.

The spelling of 681339229 in words is "six hundred eighty-one million, three hundred thirty-nine thousand, two hundred twenty-nine".