689707494587 has 2 divisors, whose sum is σ = 689707494588. Its totient is φ = 689707494586.

The previous prime is 689707494563. The next prime is 689707494643. The reversal of 689707494587 is 785494707986.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 689707494587 - 2¹⁸ = 689707232443 is a prime.

It is not a weakly prime, because it can be changed into another prime (689707494527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344853747293 + 344853747294.

It is an arithmetic number, because the mean of its divisors is an integer number (344853747294).

Almost surely, 2^689707494587 is an apocalyptic number.

689707494587 is a deficient number, since it is larger than the sum of its proper divisors (1).

689707494587 is an equidigital number, since it uses as much as digits as its factorization.

689707494587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 853493760, while the sum is 74.

The spelling of 689707494587 in words is "six hundred eighty-nine billion, seven hundred seven million, four hundred ninety-four thousand, five hundred eighty-seven".