680487587028629 has 2 divisors, whose sum is σ = 680487587028630. Its totient is φ = 680487587028628.

The previous prime is 680487587028611. The next prime is 680487587028631. The reversal of 680487587028629 is 926820785784086.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 679164097843729 + 1323489184900 = 26060777^2 + 1150430^2 .

It is a cyclic number.

It is not a de Polignac number, because 680487587028629 - 2²⁴ = 680487570251413 is a prime.

It is a super-2 number, since 2×680487587028629² (a number of 30 digits) contains 22 as substring.

Together with 680487587028631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680487587021629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340243793514314 + 340243793514315.

It is an arithmetic number, because the mean of its divisors is an integer number (340243793514315).

Almost surely, 2^{680487587028629} is an apocalyptic number.

It is an amenable number.

680487587028629 is a deficient number, since it is larger than the sum of its proper divisors (1).

680487587028629 is an equidigital number, since it uses as much as digits as its factorization.

680487587028629 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5202247680, while the sum is 80.

The spelling of 680487587028629 in words is "six hundred eighty trillion, four hundred eighty-seven billion, five hundred eighty-seven million, twenty-eight thousand, six hundred twenty-nine".