681400741429 has 2 divisors, whose sum is σ = 681400741430. Its totient is φ = 681400741428.

The previous prime is 681400741397. The next prime is 681400741447. The reversal of 681400741429 is 924147004186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680575500900 + 825240529 = 824970^2 + 28727^2 .

It is a cyclic number.

It is not a de Polignac number, because 681400741429 - 2⁵ = 681400741397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (681400781429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340700370714 + 340700370715.

It is an arithmetic number, because the mean of its divisors is an integer number (340700370715).

Almost surely, 2^681400741429 is an apocalyptic number.

It is an amenable number.

681400741429 is a deficient number, since it is larger than the sum of its proper divisors (1).

681400741429 is an equidigital number, since it uses as much as digits as its factorization.

681400741429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 681400741429 in words is "six hundred eighty-one billion, four hundred million, seven hundred forty-one thousand, four hundred twenty-nine".