687305089 has 2 divisors, whose sum is σ = 687305090. Its totient is φ = 687305088.

The previous prime is 687305083. The next prime is 687305161. The reversal of 687305089 is 980503786.

687305089 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 can be written as a sum of positive squares in only one way, i.e., 685392400 + 1912689 = 26180^2 + 1383^2 .

It is a cyclic number.

It is not a de Polignac number, because 687305089 - 2⁵ = 687305057 is a prime.

It is not a weakly prime, because it can be changed into another prime (687305083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343652544 + 343652545.

It is an arithmetic number, because the mean of its divisors is an integer number (343652545).

Almost surely, 2^687305089 is an apocalyptic number.

It is an amenable number.

687305089 is a deficient number, since it is larger than the sum of its proper divisors (1).

687305089 is an equidigital number, since it uses as much as digits as its factorization.

687305089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 687305089 is about 26216.5041338467. The cubic root of 687305089 is about 882.5036694361.

The spelling of 687305089 in words is "six hundred eighty-seven million, three hundred five thousand, eighty-nine".