687287569 has 2 divisors, whose sum is σ = 687287570. Its totient is φ = 687287568.

The previous prime is 687287567. The next prime is 687287603. The reversal of 687287569 is 965782786.

687287569 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., 685811344 + 1476225 = 26188^2 + 1215^2 .

It is a cyclic number.

It is not a de Polignac number, because 687287569 - 2¹ = 687287567 is a prime.

It is a super-2 number, since 2×687287569² = 944728405003859522, which contains 22 as substring.

Together with 687287567, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (687287563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343643784 + 343643785.

It is an arithmetic number, because the mean of its divisors is an integer number (343643785).

Almost surely, 2^687287569 is an apocalyptic number.

It is an amenable number.

687287569 is a deficient number, since it is larger than the sum of its proper divisors (1).

687287569 is an equidigital number, since it uses as much as digits as its factorization.

687287569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10160640, while the sum is 58.

The square root of 687287569 is about 26216.1699910570. The cubic root of 687287569 is about 882.4961707790.

The spelling of 687287569 in words is "six hundred eighty-seven million, two hundred eighty-seven thousand, five hundred sixty-nine".