681072863 has 2 divisors, whose sum is σ = 681072864. Its totient is φ = 681072862.

The previous prime is 681072857. The next prime is 681072877. The reversal of 681072863 is 368270186.

It is a happy number.

681072863 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 is a cyclic number.

It is not a de Polignac number, because 681072863 - 2¹² = 681068767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 681072863.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681072823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340536431 + 340536432.

It is an arithmetic number, because the mean of its divisors is an integer number (340536432).

Almost surely, 2^681072863 is an apocalyptic number.

681072863 is a deficient number, since it is larger than the sum of its proper divisors (1).

681072863 is an equidigital number, since it uses as much as digits as its factorization.

681072863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 681072863 is about 26097.3727221726. The cubic root of 681072863 is about 879.8281616090.

The spelling of 681072863 in words is "six hundred eighty-one million, seventy-two thousand, eight hundred sixty-three".