681068747 has 2 divisors, whose sum is σ = 681068748. Its totient is φ = 681068746.

The previous prime is 681068723. The next prime is 681068749. The reversal of 681068747 is 747860186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 681068747 - 2²⁰ = 680020171 is a prime.

Together with 681068749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (681068749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340534373 + 340534374.

It is an arithmetic number, because the mean of its divisors is an integer number (340534374).

Almost surely, 2^681068747 is an apocalyptic number.

681068747 is a deficient number, since it is larger than the sum of its proper divisors (1).

681068747 is an equidigital number, since it uses as much as digits as its factorization.

681068747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 681068747 is about 26097.2938635407. The cubic root of 681068747 is about 879.8263892191.

It can be divided in two parts, 6810 and 68747, that added together give a palindrome (75557).

The spelling of 681068747 in words is "six hundred eighty-one million, sixty-eight thousand, seven hundred forty-seven".