681088731139 has 2 divisors, whose sum is σ = 681088731140. Its totient is φ = 681088731138.

The previous prime is 681088731133. The next prime is 681088731151. The reversal of 681088731139 is 931137880186.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 681088731139 - 2¹³ = 681088722947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 681088731139.

It is not a weakly prime, because it can be changed into another prime (681088731133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340544365569 + 340544365570.

It is an arithmetic number, because the mean of its divisors is an integer number (340544365570).

Almost surely, 2^681088731139 is an apocalyptic number.

681088731139 is a deficient number, since it is larger than the sum of its proper divisors (1).

681088731139 is an equidigital number, since it uses as much as digits as its factorization.

681088731139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 681088731139 in words is "six hundred eighty-one billion, eighty-eight million, seven hundred thirty-one thousand, one hundred thirty-nine".